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Forum: Film / Developing / Chemistry 02-22-2018
Replies: 145
Views: 6,909
Posted By sevo
Yes. On the other hand, the big move would be to...

Yes. On the other hand, the big move would be to re-enter the reversal film market - the bulk cine volume of Kodak should make them the most competitive maker where any kind of colour material is...
Forum: Large Format Film RF 02-11-2018
Replies: 6
Views: 839
Posted By sevo
Plug-in rear fresnel frames, as popularised by...

Plug-in rear fresnel frames, as popularised by sinar, are excellent for composition and simply pop out for focusing. I am no great friend of permanently mounted rear fresnel lenses, as they interfere...
Forum: RFF News 10-04-2017
Replies: 160
Views: 11,351
Posted By sevo
A Kickstarter project will usually be marketed to...

A Kickstarter project will usually be marketed to enthusiasts over technical features - which could not be all that bad. Mind, it can hardly be high tech (Kickstarter does not provide the up-front...
Forum: Image Processing: Darkroom / Lightroom / Film 10-04-2017
Replies: 23
Views: 2,473
Posted By sevo
These days, SD cards are far cheaper (by shot)...

These days, SD cards are far cheaper (by shot) than any film ever. Given that, there is not really any need to reformat and reuse them - if you store them after the first use, they give you a extra...
Forum: Image Processing: Darkroom / Lightroom / Film 10-04-2017
Replies: 23
Views: 2,473
Posted By sevo
None of my early SD, MMC and CF cards have failed...

None of my early SD, MMC and CF cards have failed in storage so far, and these are 10-20 years old. Wherever a card failed, it was either while being written to (respectively unreadable or garbled at...
Forum: Image Processing: Darkroom / Lightroom / Film 10-03-2017
Replies: 23
Views: 2,473
Posted By sevo
I've used them like that even when they were less...

I've used them like that even when they were less affordable. Apart from convenience and building an archive independent of a solitary large medium (with the fragility of a hard disk or the dubious...
Forum: Point-N-Shoot 35mm Cameras 10-03-2017
Replies: 14
Views: 1,573
Posted By sevo
No, it does not (see the chart) - but it has a...

No, it does not (see the chart) - but it has a rather unusual 1:2 time/aperture ratio and late start of the program range. Most compacts use a fixed 1:1 ratio of time and aperture reduction...
Forum: Point-N-Shoot 35mm Cameras 10-03-2017
Replies: 14
Views: 1,573
Posted By sevo
On point-and-shoot cameras with program AE only a...

On point-and-shoot cameras with program AE only a f/2.8 lens is rather wasted - the f/2.8 will only be used in combination with the longest possible time.
Forum: Film / Developing / Chemistry 10-03-2017
Replies: 9
Views: 966
Posted By sevo
It is merely a matter of diameter. The 1500...

It is merely a matter of diameter. The 1500 series are narrow, the 2500 series wide. For many purposes they are interchangeable, as they are modular, and either can take a CPx/ATL processor cog cap...
Forum: Film / Developing / Chemistry 10-02-2017
Replies: 899
Views: 70,265
Posted By sevo
As I said on the other thread, it is questionable...

As I said on the other thread, it is questionable whether it uses 70mm/65mm film - some sources state it as 61.9mm (plausible, as that would be the width of 120 backing paper, which must fit the body...
Forum: TLR Forum - Twin Lens Reflex 10-02-2017
Replies: 21
Views: 1,449
Posted By sevo
I have NEVER seen a journalist with a long film...

I have NEVER seen a journalist with a long film mag, and financed my studies in the early eighties by freelancing for AP and dpa, right at the time when long film mags were most accessible....
Forum: TLR Forum - Twin Lens Reflex 10-02-2017
Replies: 21
Views: 1,449
Posted By sevo
Probably not. The transport mechanism does not...

Probably not. The transport mechanism does not look like it, and the original post stated 61.9mm width (which is no size of any recently common 70mm taking or viewing format).
Forum: 120 / 220 film RF's 10-01-2017
Replies: 8
Views: 1,330
Posted By sevo
Get a view camera, then. Doing repro work with a...

Get a view camera, then. Doing repro work with a camera with 1.5m viewing distance and no TTL finder is pointless. and while the earlier Fujicas had a (rare and expensive) sheet film attachment, that...
Forum: Photography General Interest 10-01-2017
Replies: 5
Views: 834
Posted By sevo
Would you say the same about Leonard Nimoy, Jeff...

Would you say the same about Leonard Nimoy, Jeff Bridges or Dennis Hopper?
Forum: 120 film RF Folders 09-28-2017
Replies: 10
Views: 1,423
Posted By sevo
Carl Zeiss with a Synchro Compur might also mean...

Carl Zeiss with a Synchro Compur might also mean it was made in the post-war era, before the formal split of Zeiss, when they were still using Jena lenses in Stuttgart. The Ikonta B/C had already...
Forum: 120 film RF Folders 09-27-2017
Replies: 10
Views: 1,423
Posted By sevo
It does not look as if any of the appendages had...

It does not look as if any of the appendages had improved its usability (except maybe blocking the transport counter, converting it to red-window only). Perhaps a Steampunk film, stage or convention...
Forum: SLRs - the unRF 09-27-2017
Replies: 22
Views: 1,643
Posted By sevo
IIRC (and going by pictures of FT on the net)...

IIRC (and going by pictures of FT on the net) there should be a tab attached between ASA and 1600 on the FT. That black "dot" ought to be be a screw hole - perhaps it has filled up with dust and nose...
Forum: SLRs - the unRF 09-26-2017
Replies: 22
Views: 1,643
Posted By sevo
Parts missing? It rather looks as if there were a...

Parts missing? It rather looks as if there were a screw hole next to the red dot, right where the shutter speed lever/ASA lock ought to be.
Forum: SLRs - the unRF 09-26-2017
Replies: 9
Views: 913
Posted By sevo
Pressure plate springs reasonably firm? In doubt...

Pressure plate springs reasonably firm? In doubt buy a second magazine and adjust the spring tension on the bad magazine to match the firm one.
Forum: SLRs - the unRF 09-24-2017
Replies: 16
Views: 1,816
Posted By sevo
Yes. Many of mine had a very loose fit, though -...

Yes. Many of mine had a very loose fit, though - don't use it without a finder that way!
Forum: SLRs - the unRF 09-24-2017
Replies: 16
Views: 1,816
Posted By sevo
It is a bit more complex than that - optical...

It is a bit more complex than that - optical focusing aids (split and microprisms) have to account for aperture, exit pupil and curvature of field. The screen plane itself must invariably be in the...
Forum: Point-N-Shoot 35mm Cameras 09-19-2017
Replies: 7
Views: 1,155
Posted By sevo
Mine delivers nice pictures, sharp, high...

Mine delivers nice pictures, sharp, high contrast, with very visible vignetting. When it works - by now mine has turned into a summer camera, prone to jam for most of the year, as the lens often...
Forum: Analog DarkRoom / Printing 09-17-2017
Replies: 5
Views: 1,022
Posted By sevo
There are several reasons for residual silver -...

There are several reasons for residual silver - underfixing is the most common, but pH issues (no or spent stop), spent fixer and fixer contamination in developer or stop can cause it as well.
Forum: Analog DarkRoom / Printing 09-17-2017
Replies: 5
Views: 1,022
Posted By sevo
If it is emulsion side only, underfixed (i.e. the...

If it is emulsion side only, underfixed (i.e. the stains are due to silver salts that still remain in the emulsion). If it affects the back side as well, too much time in spent fixer (a silver...
Forum: Zeiss Contax 09-14-2017
Replies: 26
Views: 4,715
Posted By sevo
Coatings were offered in the 1939 catalogues...

Coatings were offered in the 1939 catalogues (which may have been published in late 1938), for a relatively modest surcharge, and seem to have been fairly common (if not standard) by 1940, so Zeiss...
Forum: SLRs - the unRF 09-14-2017
Replies: 16
Views: 1,816
Posted By sevo
Split prisms and microprisms ease focusing by...

Split prisms and microprisms ease focusing by selecting the edge rays of the lens, thus creating a wide focus base. But as a direct consequence, you focus on the worst possible zone on any basic lens...
Forum: Polaroid & Fuji Instax 09-14-2017
Replies: 122
Views: 6,369
Posted By sevo
So Impossible licensed the Polaroid trademark...

So Impossible licensed the Polaroid trademark (which had almost entirely faded away in its last incarnation as a brand for low-end digital cameras). Unless that came along with enough investor money...
Forum: SLRs - the unRF 09-13-2017
Replies: 15
Views: 1,211
Posted By sevo
Sure that was a FL? These are among the oldest...

Sure that was a FL? These are among the oldest fast Canon lenses, and date back to the R mount era.



Could be - it must be thirty years since I replaced the last FTb with a F. In any case,...
Forum: SLRs - the unRF 09-13-2017
Replies: 15
Views: 1,211
Posted By sevo
It is match needle, it never displays any value -...

It is match needle, it never displays any value - you match up the ring and needle or vice versa. With FL lenses, the aperture is not coupled, so turning the aperture will not move the ring - you...
Forum: Optics Theory - 09-13-2017
Replies: 22
Views: 2,419
Posted By sevo
That has often been claimed, but it is wrong. The...

That has often been claimed, but it is wrong. The application was regularly published on November 1st 1935 - the patent was granted four years later, the then regular grace period (for claiming prior...
Forum: Technique: How To Shoot It 09-13-2017
Replies: 42
Views: 2,726
Posted By sevo
You must be way behind Germany there - a patent...

You must be way behind Germany there - a patent issue?. Arri and Kobold continuous (square wave electronic ballast) HMI has been pretty much the only available option here since the mid eighties.
Forum: Photo Accessories / Bags/ Meters / Tripods etc 09-13-2017
Replies: 11
Views: 2,197
Posted By sevo
You might try to disassemble it and add a...

You might try to disassemble it and add a cardboard washer or two. I've never done that on a FM viewfinder, but what works on RB67 bayonets (which use a related principle) ought to work here as well.
Forum: Optics Theory - 09-13-2017
Replies: 22
Views: 2,419
Posted By sevo
Too perfect, if you ask me. Given that the finder...

Too perfect, if you ask me. Given that the finder and taking lenses have different makers and will not share the glass formula it is surprising that they should develop the same bloom. Chances are...
Forum: Technique: How To Shoot It 09-12-2017
Replies: 42
Views: 2,726
Posted By sevo
I suspect that these notions date back to skin...

I suspect that these notions date back to skin colour rendition in black and white, and are now irrationally kept alive by the unusually shoddy quality of on camera flash illumination (on camera...
Forum: SLRs - the unRF 09-12-2017
Replies: 23
Views: 1,149
Posted By sevo
The edges of that lens (which are what a split...

The edges of that lens (which are what a split prism selects) miss the focus - a matter of spherical aberration...
Forum: Photo Accessories / Bags/ Meters / Tripods etc 09-12-2017
Replies: 11
Views: 2,197
Posted By sevo
No - that is, it will never be entirely tight, it...

No - that is, it will never be entirely tight, it is only positioned by friction, but it should not be entirely loose either. Check whether the three small screws inside the bayonet have come...
Forum: SLRs - the unRF 09-11-2017
Replies: 23
Views: 1,149
Posted By sevo
I've run into quite a few old-school...

I've run into quite a few old-school photographers that preferred plain-matte screens, claiming that their three-step "too far, too close, hit the focus in the middle" method did not work that well...
Forum: Zeiss Contax 09-11-2017
Replies: 5
Views: 718
Posted By sevo
If you want a camera mounted flash with more...

If you want a camera mounted flash with more features, any of the bigger Contax TTL flashes will do - personally I would recommend the 280, as the most readily available full featured (2nd curtain...
Forum: SLRs - the unRF 09-11-2017
Replies: 23
Views: 1,149
Posted By sevo
For the pro Nikons they made screens with prism...

For the pro Nikons they made screens with prism angles matching slower and longer lenses. But most people back then did not bother to swap screens to match the lens, and went with iterative focusing...
Forum: Photo Accessories / Bags/ Meters / Tripods etc 09-09-2017
Replies: 11
Views: 2,197
Posted By sevo
From the Flashmeter III on, the exposure...

From the Flashmeter III on, the exposure compensation is automatically set by a pin tracking a recess in the bayonet flange of their dedicated accessories - so if you have a FM V, and FM III or up...
Forum: Film / Developing / Chemistry 09-08-2017
Replies: 2
Views: 835
Posted By sevo
If any, they will shed dust or collect moisture....

If any, they will shed dust or collect moisture. There is no sane reason why you would want to use them as long as metal or plastics cassettes are available.
Forum: Repair / Camera Care 09-07-2017
Replies: 5
Views: 1,173
Posted By sevo
Have you already left it on power for a couple of...

Have you already left it on power for a couple of days? Usually, flashes regain their charge after some time of formatting.
Forum: Scale Focus 35's 09-05-2017
Replies: 37
Views: 2,242
Posted By sevo
There have been a few "wide" (at that time mostly...

There have been a few "wide" (at that time mostly 35mm) fixed-lens cameras in the all-mechanical pre AE era, like the Olympus Wide and Wide S, Ricoh Wide 2.4 or Kowa SW. But these are bigger than a...
Forum: Jim Lager - Leica Historian 09-04-2017
Replies: 13
Views: 1,952
Posted By sevo
Most well-known photographs were taken by press...

Most well-known photographs were taken by press officers. The pilot-issued cameras were intended for essentially clerical tasks - documenting aircraft damage, irregular display readings and the like....
Forum: Technique: How To Shoot It 09-04-2017
Replies: 31
Views: 6,598
Posted By sevo
It does not appear to be negative (unless you...

It does not appear to be negative (unless you overexposed a brightly white lit scenery against a red illuminated sky with black clouds), so no.



Possible. Or screwed up the processing (missing fix,...
Forum: Film / Developing / Chemistry 08-31-2017
Replies: 7
Views: 730
Posted By sevo
Blix has poor storage properties, and turns stale...

Blix has poor storage properties, and turns stale after some weeks - you may have exceeded its (mixed) shelf life. If it depletes ahead of the developer, try to store it in open bottles - as a rare...
Forum: Optics Theory - 08-31-2017
Replies: 5
Views: 1,097
Posted By sevo
Are you sure the focus throw is the same? If it...

Are you sure the focus throw is the same? If it is, they used a smaller CoC for the later lens. Which does not sound strange, as the film resolution increased considerably at that time.
Forum: Sony Alpha / NEX News / General Discussion 08-30-2017
Replies: 10
Views: 2,185
Posted By sevo
Have you ever used a A7 series camera? DMF...

Have you ever used a A7 series camera? DMF probably is its most popular focus mode for slow photography - where turning the focus ring will immediately throw you into manual focus with enlarged focus...
Forum: Zeiss Contax 08-30-2017
Replies: 2
Views: 760
Posted By sevo
It did not damage anything, but the recyclables I...

It did not damage anything, but the recyclables I had only provided enough power for some twenty flashes, at very slow cycle times (upwards of half a minute to start with, downhill from there). Their...
Forum: Sony Alpha / NEX News / General Discussion 08-30-2017
Replies: 10
Views: 2,185
Posted By sevo
We'll see. If Nikon slash the 6800€ 21MP D5...

We'll see. If Nikon slash the 6800€ 21MP D5 because of the D850, Sony might follow...
Forum: Point-N-Shoot 35mm Cameras 08-30-2017
Replies: 22
Views: 1,412
Posted By sevo
These were standard on plate film folders and box...

These were standard on plate film folders and box cameras - the German term was "Brilliantsucher". By the fifties the general accuracy of cameras had increased to the point that a waist level view at...
Forum: Canon Rangefinders - Peter Dechert and Peter Kitchingman 08-29-2017
Replies: 7
Views: 1,961
Posted By sevo
Mercury and silver oxide cells are voltage...

Mercury and silver oxide cells are voltage sources, so they show their nominal voltage on low loads (e.g. digital meters) even way past their useful work life, while they are decreasingly capable of...
Forum: Photography General Interest 08-27-2017
Replies: 42
Views: 2,316
Posted By sevo
For a professional "blog photographer",...

For a professional "blog photographer", exploiting a audience with a fetish certainly is advisable. "Use of a particular camera" is a pretty marginal fetish, though. Photographing genitalia, muscle...
Forum: Film / Developing / Chemistry 08-27-2017
Replies: 3
Views: 682
Posted By sevo
If you must ask, you'd best use something else....

If you must ask, you'd best use something else. According to Agfa, G74C is "a high activity, continuous tone developer, used for developing black and white continuous tone aerial images in roller...
Forum: Film / Developing / Chemistry 08-26-2017
Replies: 15
Views: 730
Posted By sevo
You should be able to HEAR if a 1/4-1/2s speed is...

You should be able to HEAR if a 1/4-1/2s speed is slow! A significant overexposure would mean the times are at least two steps off, in this case, at one to two seconds. Which is something you do not...
Forum: Help / Feedback forum 08-24-2017
Replies: 32
Views: 2,953
Posted By sevo
Even when requested through https, the site still...

Even when requested through https, the site still embeds scripts and graphics via http - Firefox might be showing a warning about that!
Forum: Help / Feedback forum 08-24-2017
Replies: 32
Views: 2,953
Posted By sevo
Digest has a couple of issues, but none which...

Digest has a couple of issues, but none which would affect a standalone forum for used camera related banter. For example, it cannot share password hash databases with other authentication methods,...
Forum: Help / Feedback forum 08-24-2017
Replies: 32
Views: 2,953
Posted By sevo
Provided that the server uses basic...

Provided that the server uses basic authentication - DIGEST has already been around since 1997.
Forum: Optics Theory - 08-24-2017
Replies: 6
Views: 1,067
Posted By sevo
If 55mm are within range, the Micro Nikkor will...

If 55mm are within range, the Micro Nikkor will do (the - period - 3.5 is only distortion free close-up and has slight distortion at infinity, the later 2.8 AI-S does away with that)...
Forum: Help / Feedback forum 08-23-2017
Replies: 32
Views: 2,953
Posted By sevo
The site is also served via https - perhaps the...

The site is also served via https - perhaps the site admin should set up a redirect...



Passwords haven't been sent unencrypted for something like 22 years. Safe authentication methods have already...
Forum: SLRs - the unRF 08-21-2017
Replies: 30
Views: 1,784
Posted By sevo
Yes. Like the original ETRS 135N it is a plain...

Yes. Like the original ETRS 135N it is a plain 24x36 back. Its only claim to "panoramic" was a 13x36 mask that could crop a bit off the top and bottom of the frame. For the Bronica there also was a...
Forum: Zeiss Contax 08-21-2017
Replies: 17
Views: 1,010
Posted By sevo
The times are hard slotted - there should be no...

The times are hard slotted - there should be no way to set an intermediate.
Forum: Scanners / Scanner Software 08-21-2017
Replies: 24
Views: 8,500
Posted By sevo
Well, comments on Amazon and ebay are very...

Well, comments on Amazon and ebay are very broadly negative, with 60-90% one-star feedback - in an era of fake feedback, it is quite hard to get a rating as bad as that. I doubt that it will work at...
Forum: SLRs - the unRF 08-20-2017
Replies: 30
Views: 1,784
Posted By sevo
They frequently are on ebay, fairly affordable...

They frequently are on ebay, fairly affordable too. Mind, "panoramic" is a strange attribution when they actually deliver a much smaller and less wide frame than the regular 120 backs (the back is...
Forum: Roger Hicks -- Author of The Rangefinder Book 08-19-2017
Replies: 100
Views: 5,385
Posted By sevo
It is much harder to find work as a illegal...

It is much harder to find work as a illegal immigrant in Germany than in the US. By percentage, illegal employment in Germany (an estimated 600.000) is negligible compared to the 11 Million in the...
Forum: Photography General Interest 08-16-2017
Replies: 10
Views: 1,071
Posted By sevo
Panel stampings generally were for assembly, and...

Panel stampings generally were for assembly, and as far as I can make out, Japanese makers used Arabic numerals there too, so that does not point to a Western origin.

As far as I can make out, the...
Forum: Photography General Interest 08-15-2017
Replies: 10
Views: 1,071
Posted By sevo
The rack mechanism, lever and knobs look very...

The rack mechanism, lever and knobs look very much like those on Mentor and Primar LF reflexes, but the former never had a SLR with integrated film holder, and while the latter are best known for...
Forum: Sony Alpha Mirrorless - All Models 08-15-2017
Replies: 8
Views: 2,501
Posted By sevo
Considering that I have used wider Biogon type...

Considering that I have used wider Biogon type lenses on the A7, it should be safe. That said, my results from a 28mm Biogon were beyond disappointing - even a cheap "wide converter" intended for...
Forum: SLRs - the unRF 08-14-2017
Replies: 6
Views: 970
Posted By sevo
A fixed screen F3 version would have been popular...

A fixed screen F3 version would have been popular among press photographers early on - holding the F/F2 with prism removed upside down to get a periscope peek through the finder above a crowd was a...
Forum: Photo Books / Mags / Articles / Blogs 08-09-2017
Replies: 12
Views: 1,663
Posted By sevo
Well, no. The majority of colour printed pages...

Well, no. The majority of colour printed pages you have seen prior to the mid 1990s will have been photogravure - photogravure was and is more consistent and less costly in high volume printing....
Forum: Zeiss Contax 08-08-2017
Replies: 8
Views: 2,695
Posted By sevo
Might be a technical issue. The provider his...

Might be a technical issue. The provider his domains are registered with has been bought up by another, which is currently moving the servers to its own site and has announced a downtime for this...
Forum: SLRs - the unRF 08-08-2017
Replies: 17
Views: 1,493
Posted By sevo
Somebody failed to notice that the bottom has...

Somebody failed to notice that the bottom has dropped out of "limited edition" collectables for good.
Forum: Film / Developing / Chemistry 08-06-2017
Replies: 38
Views: 1,251
Posted By sevo
I only use them on film whenever drying speed is...

I only use them on film whenever drying speed is more important than anything else (e.g. for press work or presentation drafts). But I never had squeegee damage on paper - so it probably would be...
Forum: Film / Developing / Chemistry 07-31-2017
Replies: 37
Views: 1,832
Posted By sevo
You do not want monochromatic filters, unless for...

You do not want monochromatic filters, unless for dramatic effect - a green filter will not undo the effect, but shift it to green. If the film is too red sensitive, colour correction filters...
Forum: Leica M Film Cameras 07-30-2017
Replies: 23
Views: 1,330
Posted By sevo
Henry Scherer is not exactly the person to turn...

Henry Scherer is not exactly the person to turn to for facts - if any, it might be said that his mechanical skills are so excellent that they make up for his deficits in theory. He has been shown to...
Forum: 120 / 220 film RF's 06-30-2017
Replies: 12
Views: 846
Posted By sevo
The lens is good. But the cameras (and even more...

The lens is good. But the cameras (and even more so the film backs) often are heavily worn. And as they only saw very limited distribution in Europe, chances to find a working one for a reasonable...
Forum: 120 / 220 film RF's 06-30-2017
Replies: 37
Views: 7,230
Posted By sevo
No, sorry, it is 100mm. Mamiya lens - it came...

No, sorry, it is 100mm. Mamiya lens - it came with my late 1980's Universal.
Forum: 120 / 220 film RF's 06-29-2017
Replies: 37
Views: 7,230
Posted By sevo
The last generation 105mm f/3.5 (rubber...

The last generation 105mm f/3.5 (rubber barrelled, with a red E on the bezel engraving) is.
Forum: Leica M Film Cameras 06-29-2017
Replies: 13
Views: 936
Posted By sevo
Salt water spray corrosion? Or a flaw in the...

Salt water spray corrosion? Or a flaw in the plating process? I've seen similar damage due to either.
Forum: Analog DarkRoom / Printing 06-29-2017
Replies: 3
Views: 814
Posted By sevo
Probably not even that, if you use a...

Probably not even that, if you use a un-replenished process - across the maybe three runs per 250ml (one film volume) you will get out of a kit, there won't be any noticeable change, as the developer...
Forum: Leica M -- Leica CL / Minolta CLE - Film 06-29-2017
Replies: 2
Views: 991
Posted By sevo
The CLE had the XG shutter button - that is the...

The CLE had the XG shutter button - that is the prominent (and wear prone) part where you can plug in the XG equivalent with minor tweaking. Beyond that, much of the similarities are only exploitable...
Forum: Technique: How To Shoot It 06-28-2017
Replies: 60
Views: 3,095
Posted By sevo
That would be a Dynafax or some similar rotating...

That would be a Dynafax or some similar rotating mirror system - these were only limited by the rotation speed (and the ability to illuminate the subject for that short a exposure). They can only...
Forum: Help / Feedback forum 06-28-2017
Replies: 8
Views: 1,163
Posted By sevo
None of the scan engines on VirusTotal report...

None of the scan engines on VirusTotal report anything suspicious. Avast does not deserve all that praise, it fails miserably on anything hosted within a dial-up range (including de-central cloud...
Forum: Film / Developing / Chemistry 06-28-2017
Replies: 28
Views: 2,961
Posted By sevo
The brand name went into different hands (IIRC of...

The brand name went into different hands (IIRC of some Danish equity company) when Rollei fell apart in 2002-2005 - the two independent camera manufacturers/sellers (F&H/DHW and Rollei Fototechnic)...
Forum: Film / Developing / Chemistry 06-28-2017
Replies: 28
Views: 2,961
Posted By sevo
There is no other colour reversal process left in...

There is no other colour reversal process left in the world, and it is unlikely that any manufacturer would resurrect an old process - getting it certified by modern environmental pollution and...
Forum: RFF News 06-27-2017
Replies: 28
Views: 3,274
Posted By sevo
That ignores globalisation and half a century of...

That ignores globalisation and half a century of bean counter driven economics. As there always will be some OEM chip foundry that can manufacture the same chip 3ct cheaper, mass production is...
Forum: Technique: How To Shoot It 06-27-2017
Replies: 60
Views: 3,095
Posted By sevo
1000ft magazines are common, and I've seen longer...

1000ft magazines are common, and I've seen longer ones listed at high-speed rental places. Quite often it was only 400ft though. Most things photographed at that speed have a very short duration, so...
Forum: Technique: How To Shoot It 06-27-2017
Replies: 60
Views: 3,095
Posted By sevo
Most ultra-high-speed cameras were permanent...

Most ultra-high-speed cameras were permanent motion, the image being stabilized by rotating prisms or mirrors - no perforation would survive the acceleration and deceleration needed to step film...
Forum: Technique: How To Shoot It 06-26-2017
Replies: 60
Views: 3,095
Posted By sevo
There can be no other place in the world where it...

There can be no other place in the world where it is quite as likely to walk into a high power radar beam at that close a distance...
Forum: Leica Screw Mount / LTM Cameras 06-26-2017
Replies: 9
Views: 786
Posted By sevo
It probably is. I remember seeing pictures of a...

It probably is. I remember seeing pictures of a LTM remounted one some years ago.
Forum: Technique: How To Shoot It 06-25-2017
Replies: 60
Views: 3,095
Posted By sevo
Unlikely, though, press photographers of the era...

Unlikely, though, press photographers of the era generally carried them loose in their pocket, without any known incidents of PJ self immolation. It takes more power to ignite a flash bulb than you'd...
Forum: Large Format Film RF 06-25-2017
Replies: 66
Views: 4,835
Posted By sevo
Get a soft dark cloth with lead (these days...

Get a soft dark cloth with lead (these days probably tungsten) curtain cord sewn into in the seams.
Forum: Technique: How To Shoot It 06-22-2017
Replies: 50
Views: 2,835
Posted By sevo
Must be a American distinction. In BE, it used to...

Must be a American distinction. In BE, it used to be flash throughout, strobe being a stroboscope, i.e. a rapidly repeating stage decoration (or scientific/technical) flash, and the AE "flashlight"...
Forum: Technique: How To Shoot It 06-22-2017
Replies: 50
Views: 2,835
Posted By sevo
He stated that he used a single flash bulb in...

He stated that he used a single flash bulb in place of a candle, and the single, hard shadow confirms that. And there were no soft boxes on flash bulbs and other light sources of the time, prior to...
Forum: Technique: How To Shoot It 06-22-2017
Replies: 50
Views: 2,835
Posted By sevo
Retouche the eyes... ;) Seriously, according to...

Retouche the eyes... ;) Seriously, according to interviews with him, the picture was posed and heavily retouched for effect. Hard lighting with one single off-camera flash bulb - no soft-box nor...
Forum: SLRs - the unRF 06-20-2017
Replies: 107
Views: 3,512
Posted By sevo
Pretty much any of the bunch designed after the...

Pretty much any of the bunch designed after the mid seventies, provided you like the lenses available for the mount and whatever special features the body might have. The first generation had...
Forum: Film / Developing / Chemistry 06-13-2017
Replies: 3
Views: 482
Posted By sevo
Hard to tell when. Kodak Alaris claim it to be in...

Hard to tell when. Kodak Alaris claim it to be in stock within a month. But so they did for the past three months. YMMV - roll film has a odd strength, so it can't be cut off sheet and 135/cine...
Forum: Scanners / Scanner Software 06-12-2017
Replies: 136
Views: 7,010
Posted By sevo
Can't be done literally - it is a mask, not a...

Can't be done literally - it is a mask, not a constant stain, so applying a complimentary constant will not make it vanish. What you can however do is to apply the complimentary colour at the average...
Forum: Optics Theory - 06-11-2017
Replies: 32
Views: 2,053
Posted By sevo
That is not the camera or lens, nor the scanner...

That is not the camera or lens, nor the scanner optics. It is a colour rendering issue - somewhere some software component makes a poor decision regarding colour mapping. Blue pastels are in a area...
Forum: Half Frames / Subminiatures 06-10-2017
Replies: 6
Views: 1,871
Posted By sevo
Straight from the...

Straight from the source?

http://www.minox.com/index.php?id=7566&L=2
Forum: SLRs - the unRF 06-09-2017
Replies: 36
Views: 1,545
Posted By sevo
The EL is fine - but it takes that odd 6.2V...

The EL is fine - but it takes that odd 6.2V (544/4SR44) battery of the Canon New F-1, A-1 or Mamiya M645, which is still available.
Forum: SLRs - the unRF 06-09-2017
Replies: 36
Views: 1,545
Posted By sevo
All Nikons from the F2 Photomic/Nikkormat FT2 on...

All Nikons from the F2 Photomic/Nikkormat FT2 on - strictly speaking they were designed for silver oxide cells, but (at least up to the FE and FM2n) they will also cope with mercury cells (if you can...
Forum: Leica SL 06-09-2017
Replies: 40
Views: 6,729
Posted By sevo
YMMV. I doubt that anybody in the group already...

YMMV. I doubt that anybody in the group already knows how the A9 performs (or what its UI is like)...
Forum: Photography General Interest 06-09-2017
Replies: 46
Views: 1,534
Posted By sevo
Oh, was that meant as a "why did manufacturers...

Oh, was that meant as a "why did manufacturers ever remove such a core function from their cameras and make it a bolt-on" question, as people born after the big AF divide might put it?
Forum: Leica SL 06-08-2017
Replies: 40
Views: 6,729
Posted By sevo
The Sony A9 is intended to be a PJ/sports pro...

The Sony A9 is intended to be a PJ/sports pro body, and much younger. If you are into low light or high frame rates, it is a class or two above the SL. But for most applications, that difference will...
Forum: Zeiss Contax 06-08-2017
Replies: 18
Views: 1,734
Posted By sevo
No. Indeed it is more long-lived than the Contax...

No. Indeed it is more long-lived than the Contax II shutter, as it does not strain the ribbons as much. It however is prone to fading, so the 1/1250 and often the 1/500 can't be trusted - and that...
Forum: Photography General Interest 06-08-2017
Replies: 46
Views: 1,534
Posted By sevo
Back in the days it meant getting a second shot,...

Back in the days it meant getting a second shot, and added counterweight for long lenses. These days I only use motors where they are integral, or where they significantly improve handling (e.g. on...
Forum: Optics Theory - 06-07-2017
Replies: 10
Views: 1,203
Posted By sevo
Different period though - his 16mm experimental...

Different period though - his 16mm experimental film work was in (and around) the sixties.
Forum: Optics Theory - 06-07-2017
Replies: 10
Views: 1,203
Posted By sevo
IIRC he started out with some "miniature" 127...

IIRC he started out with some "miniature" 127 film 30x40mm camera - which is the frame ratio of that picture - and later turned to Leicas. Neither is likely to have had a Sonnar.
Forum: Repair / Camera Care 06-06-2017
Replies: 12
Views: 1,018
Posted By sevo
Original Contax spools are rare, original Contax...

Original Contax spools are rare, original Contax daylight spools even rarer. But many other detachable spools will work just as well. In desperation, even spools from a film canister will do - but...
Forum: Film / Developing / Chemistry 06-05-2017
Replies: 17
Views: 1,519
Posted By sevo
That is Kodak Vision Digital Intermediate Film....

That is Kodak Vision Digital Intermediate Film. Cine film transfer recorders are bright (three-beam laser or a CRT projected down to a 12x24mm or smaller image), hence the low speed.
Forum: SLRs - the unRF 06-02-2017
Replies: 17
Views: 2,027
Posted By sevo
128GB. Other than SD, the CF standard had...

128GB. Other than SD, the CF standard had generous hardware limits right from the start. And even the initial D70 could read and write to FAT32 file systems. But back when it was new and I owned one,...
Forum: Repair / Camera Care 06-01-2017
Replies: 17
Views: 898
Posted By sevo
Aperture coupling tab damaged or broken off?...

Aperture coupling tab damaged or broken off? Assuming a aperture metering range down to f/128, 13 stops would be exactly the value I'd expect if the camera fails to read out the aperture on a lens...
Forum: SLRs - the unRF 06-01-2017
Replies: 158
Views: 25,845
Posted By sevo
Canon had the shortest register distance among...

Canon had the shortest register distance among the mainstream mounts, plus a breech lock system that added to adapter depth. Not even Alpa (5mm shorter register than Canon) provided enough clearance...
Forum: Photography General Interest 06-01-2017
Replies: 31
Views: 1,593
Posted By sevo
Only then...

Only then...
Forum: Photography General Interest 05-31-2017
Replies: 31
Views: 1,593
Posted By sevo
Period meniscus lenses and half convertibles...

Period meniscus lenses and half convertibles would all be f/9 or even slower Given that he quite obviously goes for narrow DOF, it should be something faster. Perhaps a Imagon?
Forum: Photography General Interest 05-31-2017
Replies: 31
Views: 1,593
Posted By sevo
Haven't the faintest. Bag mags hold 12 or 18...

Haven't the faintest. Bag mags hold 12 or 18 sheets, Grafmatics six each, and even the most esoteric German and British bag mag alternatives I own or have seen (which would need conversion) hold less...
Forum: Photography General Interest 05-31-2017
Replies: 31
Views: 1,593
Posted By sevo
Can't be a pinhole as the pictures show very...

Can't be a pinhole as the pictures show very narrow DOF (while pinhole DOF is infinite). But the camera has no protruding lens on all other pictures of him as well, so it will not be a case of him...
Forum: Photography General Interest 05-31-2017
Replies: 31
Views: 1,593
Posted By sevo
No lens on the camera?

No lens on the camera?
Forum: Zeiss Contax 05-31-2017
Replies: 4
Views: 810
Posted By sevo
No literature I have mentions even a single...

No literature I have mentions even a single legitimate black IIa or IIIa.
Forum: Leica General Discussion / News / Rumors 05-31-2017
Replies: 1
Views: 636
Posted By sevo
IR TTL flash? Even IR AE is generally...

IR TTL flash? Even IR AE is generally frustrating, as you cannot get the spectral response of film and cell to match. IR flash adds the spectral properties of the flash head as a third variable. In...
Forum: Epson R-D1 Leica M mount Digital Rangefinder 05-29-2017
Replies: 7
Views: 841
Posted By sevo
Mind, the SD 1.10 specification was released in...

Mind, the SD 1.10 specification was released in 2001, years before the R-D1. It is rather unlikely that any revision of the latter did not support 2GB SD cards (and all 2GB cards are SD - SDHC starts...
Forum: Epson R-D1 Leica M mount Digital Rangefinder 05-29-2017
Replies: 7
Views: 841
Posted By sevo
You are aware that SD is limited to 2GB? Anything...

You are aware that SD is limited to 2GB? Anything bigger is SDHC (or SDXC). On the other hand there is no such thing as a 2GB or smaller SDHC card - if you tried with a variety of SD sized cards,...
Forum: Photo Software 05-16-2017
Replies: 105
Views: 8,330
Posted By sevo
I can still run Photoshop 3.5 (from around 1995)...

I can still run Photoshop 3.5 (from around 1995) on Win10, so the notion that the sky is falling may be a bit exaggerated...

Arguably Photoshop 3.5 has ceased to run on Macs - not for OS reasons,...
Forum: Bill Pierce - Leica M photog and author 05-02-2017
Replies: 5
Views: 1,137
Posted By sevo
Portrait photography always has been a market...

Portrait photography always has been a market segment where photographers could only demand payment if used expensive and inaccessible tools to create a flattering result - the average passport...
Forum: Optics Theory - 04-30-2017
Replies: 79
Views: 7,788
Posted By sevo
Agfa Ortho and Rollei Ortho were/are...

Agfa Ortho and Rollei Ortho were/are high-contrast technical films. Ilford Ortho is sheet film only - and while it is less hard to pull than the former (it does develop to normal contrast in regular...
Forum: Optics Theory - 04-30-2017
Replies: 79
Views: 7,788
Posted By sevo
When did the last pictorial Ortho films vanish?...

When did the last pictorial Ortho films vanish? By the mid seventies at least Western Germany was strictly Pan film, with all remaining Ortho films high contrast specialities.
Forum: Analog DarkRoom / Printing 04-29-2017
Replies: 25
Views: 1,478
Posted By sevo
The human eye is remarkably sensitive. More so...

The human eye is remarkably sensitive. More so than any camera or electronic meter that you can afford and that does not need liquid nitrogen cooling. If you cannot see any light leaks after five to...
Forum: SLRs - the unRF 04-28-2017
Replies: 24
Views: 1,337
Posted By sevo
You should be able to see for yourself whether...

You should be able to see for yourself whether you get visible amounts of unilateral vertical motion blur with your current camera and specified parameters - any other type and direction of motion...
Forum: SLRs - the unRF 04-28-2017
Replies: 24
Views: 1,337
Posted By sevo
Do you have any manual focus Nikon? If so,...

Do you have any manual focus Nikon? If so, chances are that you already have mirror lock-up, at least enough of it for your purposes. Among the "lesser" Nikons, all Nikkormats (other than the...
Forum: Micro 4/3 Cameras Olympus Panasonic 04-26-2017
Replies: 4
Views: 969
Posted By sevo
Embrace it while it still is possible - in parts...

Embrace it while it still is possible - in parts of Germany where LED lamps have already taken over public illumination there is not much near IR left at night, apart from barbecues, campfires,...
Forum: Film / Developing / Chemistry 04-25-2017
Replies: 40
Views: 2,132
Posted By sevo
Given that Rollei 80S is a traffic film, its red...

Given that Rollei 80S is a traffic film, its red sensitivity ought to be higher than that of the meter. Some IR films are essentially blue/red sensitive only in the visible range, where a...
Forum: Sony Alpha Mirrorless - All Models 04-25-2017
Replies: 13
Views: 1,422
Posted By sevo
It is the regular artefact that appears whenever...

It is the regular artefact that appears whenever a rolling shutter is used at high shutter speeds (narrow slit width) with a AC grid powered lamp with no (or small) afterglow (like discharge lamps,...
Forum: Olympus RF 04-24-2017
Replies: 9
Views: 1,334
Posted By sevo
It is peculiar to electrolyte condensers....

It is peculiar to electrolyte condensers. Reforming can only cure capacitors with a inactivated dielectric layer (i.e. temporally low resistance and reduced capacity). Short-circuited ones as well as...
Forum: Zeiss Contax 04-22-2017
Replies: 3
Views: 553
Posted By sevo
That is a Exakta mount lens, and that is its...

That is a Exakta mount lens, and that is its aperture stop-down tab - the Exakta had no camera side stop-down mechanism, it is entirely lens-side. The knob in the middle is the sprung release button,...
Forum: Leica General Discussion / News / Rumors 04-22-2017
Replies: 13
Views: 1,586
Posted By sevo
I agree. When that logo was designed, Gothic...

I agree. When that logo was designed, Gothic typefaces still were standard in Germany, and the official handwriting taught at German schools was "Sütterlin", a ridiculously edgy (and nowadays...
Forum: Leica M Film Cameras 04-21-2017
Replies: 19
Views: 1,077
Posted By sevo
Assuming it to be genuine at the core, it has at...

Assuming it to be genuine at the core, it has at least seen extensive repairs. The mount looks like new, which is unlikely given the amount of paint wear on the body - not entirely impossible, as the...
Forum: Optics Theory - 04-20-2017
Replies: 79
Views: 7,788
Posted By sevo
Many of the longer, slower Visoflex Telyt heads...

Many of the longer, slower Visoflex Telyt heads are cemented doublets (and so are the period Novoflex lens heads). It will hardly go any less than that...
Forum: Help / Feedback forum 04-20-2017
Replies: 5
Views: 1,372
Posted By sevo
No illegitimate clone, but the test site for the...

No illegitimate clone, but the test site for the often proposed site upgrade! The last time I checked, work on it had been resting for quite a while - the mirrored data base it uses was months off...
Forum: Polaroid & Fuji Instax 04-19-2017
Replies: 59
Views: 6,983
Posted By sevo
Hard to tell - it is eight-bit (as in "256 levels...

Hard to tell - it is eight-bit (as in "256 levels per color (RGB)"), which is not state of the art, but the pro slide printers I've used were limited to eight bit technology as well (arguably they...
Forum: Polaroid & Fuji Instax 04-19-2017
Replies: 59
Views: 6,983
Posted By sevo
What is hybrid analogue about it? As far as I...

What is hybrid analogue about it? As far as I understand the Fuji site, it is a digital camera with an integrated (instant film) printer - the differences to the Polaroid Snap being the format and...
Forum: Film / Developing / Chemistry 04-18-2017
Replies: 8
Views: 667
Posted By sevo
That might actually work out for HP5+ and Tri-X,...

That might actually work out for HP5+ and Tri-X, if you adjust the exposure accordingly - the times for them are within 15% or less of each other with most well-behaved developers. Most photographers...
Forum: Film / Developing / Chemistry 04-18-2017
Replies: 8
Views: 667
Posted By sevo
Just about anything you can buy off any regular...

Just about anything you can buy off any regular online store. There are very few and rather special developers (which you will usually have to mix from scratch, as they only exist as a recipe, not as...
Forum: SLRs - the unRF 04-17-2017
Replies: 13
Views: 2,074
Posted By sevo
It looks more like a Chinon OEM camera, like the...

It looks more like a Chinon OEM camera, like the contemporary Alpa Si 2000. But I don't think Ricoh relabelled a Chinon or Cosina - as Ricoh themselves tried to expand into their OEM trade in the mid...
Forum: SLRs - the unRF 03-31-2017
Replies: 12
Views: 1,247
Posted By sevo
The higher frequency, the smaller the converter...

The higher frequency, the smaller the converter can be. Usually LED converters are using 35-50kHz - that is still out of the range where RF shielding is mandatory, and high enough that even the first...
Forum: SLRs - the unRF 03-30-2017
Replies: 12
Views: 1,247
Posted By sevo
Thanks to their lower power requirements and DC...

Thanks to their lower power requirements and DC operation, the electronic ballasts in LED lamps are creating much less problems than the electronic ballasts in CFL lamps and modern FL tube fixtures...
Forum: Film / Developing / Chemistry 03-29-2017
Replies: 19
Views: 1,565
Posted By sevo
There was only one Super 8 that came in cassettes...

There was only one Super 8 that came in cassettes (IIRC Beaulieu and Bauer each had one top end S8 camera that also took long mags, but these were a extension of the regular cartridge format). The...
Forum: Film / Developing / Chemistry 03-28-2017
Replies: 41
Views: 2,106
Posted By sevo
YMMV - it may depend on the film and developer. I...

YMMV - it may depend on the film and developer. I certainly had issues with Fuji Neopan 120 in Xtol (the only developer I use reverse osmosis water for), but none with the 35mm version of the same...
Forum: Film / Developing / Chemistry 03-28-2017
Replies: 41
Views: 2,106
Posted By sevo
The electrolyte content of tap water is much...

The electrolyte content of tap water is much closer to distilled water than to blood and serum - it is more like "where drinking 10l of tap water in one go will kill you, 8l of distilled will...
Forum: Film / Developing / Chemistry 03-28-2017
Replies: 41
Views: 2,106
Posted By sevo
There are tap water conditioning additives in...

There are tap water conditioning additives in ready made developers. Using them on distilled water could have undesirable side effects like excess frothing.
Forum: SLRs - the unRF 03-27-2017
Replies: 16
Views: 669
Posted By sevo
I have no (non-zoom) Nikkors with as much as 15mm...

I have no (non-zoom) Nikkors with as much as 15mm excess travel - but most of them twist to about 3-5mm past the closest engraved distance (while they exactly hit the infinity mark).
Forum: SLRs - the unRF 03-27-2017
Replies: 16
Views: 669
Posted By sevo
Infinity is infinity - there is no meaningful...

Infinity is infinity - there is no meaningful focusing past that point. You can get arbitrarily close, however, and few lenses (apart from dedicated macro/micro lenses) mark their closest possible...
Forum: Nikon RF 03-24-2017
Replies: 24
Views: 2,053
Posted By sevo
It is geared, with a very significant reduction...

It is geared, with a very significant reduction that way around. So no, that should not matter, if all components run smoothly - indeed the other way around might place more strain on the mechanism....
Forum: Film / Developing / Chemistry 03-23-2017
Replies: 72
Views: 2,796
Posted By sevo
X-Pan was a embarrassingly silly monument to poor...

X-Pan was a embarrassingly silly monument to poor research - they started a new format immediately next to the widely established Cinemascope 2.65:1. Cinema still photographers probably are banging...
Forum: Film / Developing / Chemistry 03-23-2017
Replies: 9
Views: 923
Posted By sevo
Cine camera stock comes in increments of 100ft...

Cine camera stock comes in increments of 100ft (30.5m). 17m is longer than the shortest cine length of 50ft, used by the smallest hand cameras (and by long film magazines for pro SLRs). It is ten 36...
Forum: Point-N-Shoot 35mm Cameras 03-23-2017
Replies: 30
Views: 8,824
Posted By sevo
Fancy looks, but feature-wise it was easily the...

Fancy looks, but feature-wise it was easily the lowest tech boutique point-and-shoot ever, way below the mju series - a triplet lens with three position AF and 100/400 DX place it firmly in the range...
Forum: Film / Developing / Chemistry 03-23-2017
Replies: 9
Views: 923
Posted By sevo
Nominal lengths in one measure may be off by less...

Nominal lengths in one measure may be off by less than half a foot as makers tend to give a rounded number for either metres or feet - but the length should be exactly accurate in one measure. A...
Forum: Film / Developing / Chemistry 03-22-2017
Replies: 9
Views: 923
Posted By sevo
It should be accurate to the centimetre. How do...

It should be accurate to the centimetre. How do YOU measure its length?
Forum: SLRs - the unRF 03-22-2017
Replies: 77
Views: 5,994
Posted By sevo
As far as I can make out, and I have at one time...

As far as I can make out, and I have at one time or other had all of them, there are only two optical designs for the 50 1.8 Nikkors, in a variety of barrels, brandings and perhaps coatings:

The...
Forum: SLRs - the unRF 03-22-2017
Replies: 28
Views: 1,130
Posted By sevo
... or you will always have to wonder where you...

... or you will always have to wonder where you last put the adapter!
Forum: SLRs - the unRF 03-22-2017
Replies: 77
Views: 5,994
Posted By sevo
There never was a S-type - The -S in SLR Nikkors...

There never was a S-type - The -S in SLR Nikkors of the F type era (later types were K, AI and AI-S) is a letter for the number of elements in the lens. Abbreviated Latin for "septem", seven (they...
Forum: SLRs - the unRF 03-21-2017
Replies: 77
Views: 5,994
Posted By sevo
As far as I know, the first generation shorter...

As far as I know, the first generation shorter AI-S lens had the same formula as the long-nosed AI one, it is just missing the integrated shade. The pancake E lens has a different formula, supposedly...
Forum: SLRs - the unRF 03-21-2017
Replies: 77
Views: 5,994
Posted By sevo
The 55/2.8 is even better for general...

The 55/2.8 is even better for general photography, but worse for 1:2 to 1:1 macro as the CRC floating element does only correct for infinity to 1:2. More modern close-range corrected macro lenses go...
Forum: SLRs - the unRF 03-21-2017
Replies: 28
Views: 1,130
Posted By sevo
No, that is because the load digital voltmeters...

No, that is because the load digital voltmeters impose on the diode is way too low - good ones have a resistance deep in the MOhm range. Put some resistor (something between 5-50kOhm will give a...
Forum: Roger Hicks -- Author of The Rangefinder Book 03-21-2017
Replies: 23
Views: 3,107
Posted By sevo
The main problem would be to get at everything up...

The main problem would be to get at everything up to the last spore. Thymol will not magically penetrate everything unless you bounce up the concentration to the point where it will eat into the...
Forum: Analog DarkRoom / Printing 03-20-2017
Replies: 4
Views: 1,260
Posted By sevo
Is there still US made HC-110? Kodak sold their...

Is there still US made HC-110? Kodak sold their chemicals division to Champion a decade ago, and when Champion stopped serving Kodak after the insolvency, Tetenal stepped in - I don't think Kodak...
Forum: SLRs - the unRF 03-20-2017
Replies: 28
Views: 1,130
Posted By sevo
The conversion should do exactly the same thing...

The conversion should do exactly the same thing as the adapter - namely, insert a drop diode or two into the circuit.
Forum: Roger Hicks -- Author of The Rangefinder Book 03-20-2017
Replies: 23
Views: 3,107
Posted By sevo
Thymol is an antiseptic, but it also is a very...

Thymol is an antiseptic, but it also is a very capable solvent and softener - it might mobilise grease, strip paint and adhesives and soften plastics (Listerine spills once ate through my plastics...
Forum: 120 film RF Folders 03-20-2017
Replies: 7
Views: 1,339
Posted By sevo
With electronic flash, X sync is all you ever...

With electronic flash, X sync is all you ever need.

M (medium) and F (fast burning bulb) speeds delay the shutter behind the flash release, to different degrees. This was relevant to use flash bulbs...
Forum: SLRs - the unRF 03-20-2017
Replies: 8
Views: 826
Posted By sevo
The MG is essentially a MV with the in-finder...

The MG is essentially a MV with the in-finder exposure time display of the ME thrown in, the bargain companion to the ME super (where the MV was the bargain ME). Feels cheaper than the ME, but...
Forum: 120 / 220 film RF's 03-18-2017
Replies: 13
Views: 2,198
Posted By sevo
The original Graflex roll film holders are shoddy...

The original Graflex roll film holders are shoddy - poorly made, leaking dust and light, and with some brittle plastics parts. But as they have a standardized attachment, there are alternatives....
Forum: Analog DarkRoom / Printing 03-18-2017
Replies: 39
Views: 3,006
Posted By sevo
I have stored both in factory sealed for many...

I have stored both in factory sealed for many years beyond their expiration date. HC-110 does not even turn brown over a decade past expiration in factory sealed bottles (at least the 1l ones they...
Forum: 120 / 220 film RF's 03-18-2017
Replies: 10
Views: 936
Posted By sevo
Well, sort of. 120 is fixed on the wrong end, so...

Well, sort of. 120 is fixed on the wrong end, so naive respooling will end up with film with a considerable bulge and corresponding transport and light leak problems. The one case where you can avoid...
Forum: 120 / 220 film RF's 03-17-2017
Replies: 10
Views: 936
Posted By sevo
It is a medium format camera, and 120 film is not...

It is a medium format camera, and 120 film is not designed to be rewound, but goes to a pickup spool. When reset, the counter starts again, winding past the leader to frame one. By mid film there...
Forum: Repair / Camera Care 03-16-2017
Replies: 8
Views: 920
Posted By sevo
The spots where the coating has become damaged...

The spots where the coating has become damaged seem to make up something like 10% of the total area. And the Ennit is a Tessar copy.
Forum: Repair / Camera Care 03-16-2017
Replies: 8
Views: 920
Posted By sevo
Coating damage. On coatings from that era it...

Coating damage. On coatings from that era it might be a fabrication flaw, on more modern cameras it usually is secondary to fungus, or to exposure to rain or to sea water spray.

It is irrelevant -...
Forum: Photography General Interest 03-14-2017
Replies: 22
Views: 1,209
Posted By sevo
Well, among my hand-me-downs there were several...

Well, among my hand-me-downs there were several A-1's. None of them work (two out of four work in all manual only, one works only in aperture priority mode, one is entirely dead).
Forum: Repair / Camera Care 03-14-2017
Replies: 34
Views: 1,971
Posted By sevo
You are aware of how a focal plane shutter works?...

You are aware of how a focal plane shutter works? Small camera FP shutters generally have only one speed (the one indicated as "sync speed") - for shorter times, they link both curtains so that only...
Forum: SLRs - the unRF 03-14-2017
Replies: 14
Views: 991
Posted By sevo
That is the normal behaviour on every...

That is the normal behaviour on every helical-focused lens, where the amount of twist must be proportional to the amount of extension (this is not necessarily true for geared, curve-focused or...
Forum: SLRs - the unRF 03-13-2017
Replies: 14
Views: 991
Posted By sevo
I always bought black ones - around 1990 they...

I always bought black ones - around 1990 they were the standard version bought by studio pros, to make do with less baffling when photographing reflective objects. It is prone to scratches and wears...
Forum: Film / Developing / Chemistry 03-12-2017
Replies: 15
Views: 1,054
Posted By sevo
The IR speed of Rollei is about 12 ISO or less,...

The IR speed of Rollei is about 12 ISO or less, so a IR blocking filter will contribute a mere 1/32 stop to the exposure - its visible light transparency probably accounts for more.

Sure you did...
Forum: Film / Developing / Chemistry 03-10-2017
Replies: 12
Views: 687
Posted By sevo
It has nothing to do with x-ray, or the camera,...

It has nothing to do with x-ray, or the camera, exposure or processing. This is a chemical interaction of the film with the backing paper imprint. A known issue with film for the past two decades....
Forum: Photography General Interest 03-09-2017
Replies: 15
Views: 1,551
Posted By sevo
If there were lens designers called Bulgarov or...

If there were lens designers called Bulgarov or Gibraltarovic, maybe. That is, the Russar was named after its designer Russinov...
Forum: SLRs - the unRF 03-09-2017
Replies: 14
Views: 1,296
Posted By sevo
Nikon objected to Canon strolling into their...

Nikon objected to Canon strolling into their (F/F2) trademark domain, and Canon was only granted the use of F-1 on the base of the hyphen and Nikon having left out the F1. But that eliminated the...
Forum: Point-N-Shoot 35mm Cameras 03-09-2017
Replies: 12
Views: 1,214
Posted By sevo
Unlikely. There would not be any point on making...

Unlikely. There would not be any point on making it a contact pair if it merely was a spring. And I have come across that same minimal DX layout in several cheap cameras.
Forum: SLRs - the unRF 03-08-2017
Replies: 14
Views: 1,296
Posted By sevo
That is a general feature of pro cameras (where...

That is a general feature of pro cameras (where Nikon defined the standard with the 100% screen of the F).



They are very noticeably brighter. Indeed, the A-1 finder is dim even compared to...
Forum: Photography General Interest 03-08-2017
Replies: 15
Views: 1,551
Posted By sevo
No. The Voigtländer Collinear/Kollinear and Zeiss...

No. The Voigtländer Collinear/Kollinear and Zeiss Protar preceded it by a decade, and these are just the most popular ones...
Forum: Film / Developing / Chemistry 03-06-2017
Replies: 9
Views: 820
Posted By sevo
No. With modern film (i.e. pretty much anything...

No. With modern film (i.e. pretty much anything made for the consumer market after WWII) it takes some 10-30°C difference. A large ph difference may make it happen with a smaller or even no...
Forum: Analog DarkRoom / Printing 03-05-2017
Replies: 6
Views: 870
Posted By sevo
Stop (acetic or citric acid) is a component of...

Stop (acetic or citric acid) is a component of acidic fixer, so these may be mixed.

Mixing anything with alkaline (colour) fixer or blix will however make it hard to regenerate them and recover the...
Forum: Analog DarkRoom / Printing 03-05-2017
Replies: 6
Views: 870
Posted By sevo
Ask the disposal company you work with. Back when...

Ask the disposal company you work with. Back when I still ran a ATL the local one wanted all stages mixed, except for the fixer/blix (which goes to silver recovery, and in the case of fixer,...
Forum: Point-N-Shoot 35mm Cameras 03-05-2017
Replies: 12
Views: 1,214
Posted By sevo
If you count that way, that would make it 3. The...

If you count that way, that would make it 3. The one that switches from isolated to blank at 400. Technically that is the 400+ switch - the assumption being that point-and-shoot consumer film at that...
Forum: Point-N-Shoot 35mm Cameras 03-05-2017
Replies: 12
Views: 1,214
Posted By sevo
Where does it say that supports 25? It can only...

Where does it say that supports 25? It can only do two speeds on the strength of that single DX switch. In all probability that will be 100/400, as the 200 era did not start until around 1990 and 50...
Forum: Point-N-Shoot 35mm Cameras 03-05-2017
Replies: 12
Views: 1,214
Posted By sevo
Many cameras do not bother to resolve each DX...

Many cameras do not bother to resolve each DX speed, but only use as many contacts as they need to discriminate between the two or three speeds they support. Here, it is field 5 (the fourth within...
Forum: Photo Accessories / Bags/ Meters / Tripods etc 03-04-2017
Replies: 4
Views: 692
Posted By sevo
No. But there is not that much mental maths...

No. But there is not that much mental maths involved - 3 ASA is six stops from 100 ASA...
Forum: Photo Accessories / Bags/ Meters / Tripods etc 03-04-2017
Replies: 4
Views: 692
Posted By sevo
The Diaphot has a fixed scale for medium speed...

The Diaphot has a fixed scale for medium speed plates of the era - i.e. 14°-17° Scheiner. That would be equivalent to about 2-4 ASA.
Forum: Photo Accessories / Bags/ Meters / Tripods etc 03-03-2017
Replies: 6
Views: 851
Posted By sevo
Maybe they are more affordable in the US, but in...

Maybe they are more affordable in the US, but in Europe, Wein cells are quite idiotically expensive. On cameras that see constant use, I use silver oxide cells in drop-diode adapters, or soldered...
Forum: 120 film RF Folders 03-01-2017
Replies: 47
Views: 5,531
Posted By sevo
The paper is even in strength - the pressure...

The paper is even in strength - the pressure plate and/or film gate make up for the difference (hence the switchable pressure plates for 120/220 film on e.g. Fuji and Mamiya cameras).
Forum: Scale Focus 35's 02-27-2017
Replies: 45
Views: 7,029
Posted By sevo
Asahi (Pentax) actually are one of the oldest...

Asahi (Pentax) actually are one of the oldest companies in Japanese optics, a telescope (and gun/bomb sights) maker. After the war they supplied lenses to Konica and Minolta. The Pentax SLRs were the...
Forum: Film / Developing / Chemistry 02-27-2017
Replies: 92
Views: 6,995
Posted By sevo
Kodachrome was processed by a few select...

Kodachrome was processed by a few select laboratories - outside the US only by Kodak themselves or their contractors. And even in the US, where a court had forced Kodak to sell chemistry and...
Showing results 1 to 199 of 1000

 


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