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Voigtlander 50mm f/2.5 S Mount
Old 06-18-2019   #1
wjlapier
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Voigtlander 50mm f/2.5 S Mount

I'm curious. Is there any difference between the S mount and the LTM mount with this lens aside from the mount? I have one of Amedeo's S>LTM adapters and can find the Voigtlander S mount lenses for less than their LTM version.
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Old 06-18-2019   #2
Erik van Straten
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I have both, they are the same, athough my "S" version is even sharper than the "LTM" version. The colour of the coating is different. It is simply another batch.

The market for the "S" version is much smaller, hence the difference in price. Buy one if you can. This lens on a Nikon S2 is great, also because the shade is super handy. It is the best 50mm for the Nikon S series.

Nikon S2, S Skopar 50mm f/2.5, 400-2TMY, printed on Adox MCC 110.

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Old 06-18-2019   #3
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I made the mistake of selling my Amedeo S>LTM adapter a while back...he doesn’t appear to make them anymore.
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Old 06-18-2019   #4
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Quote:
Originally Posted by splitimageview View Post
I made the mistake of selling my Amedeo S>LTM adapter a while back...he doesn’t appear to make them anymore.
He has been having great production problems. I have them in stock.

also the next shipment of Nikon / Contax Rangefinder to M adapters is in transit

https://shop.cameraquest.com/amedeo-adapters/


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Old 06-18-2019   #5
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I have an Amedeo adapter — Contax RF to Leica M. My Zeiss Opton Sonnar 50/2.0 works perfectly on it. My recently acquired Skopar 50/2.5 in S mount does not. I don’t know whether this reflects a subtle difference between Nikon S mounts and Contax RF mounts, but I also noticed that the Skopar mounts resembles that of the Biogon 35/2.8 rather than the Opton Sonnar 50. My point is that the OT may want to confirm that a Skopar 50 in an S mount will work on the Amedeo S to LTM adapter.
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Old 06-18-2019   #6
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Quote:
Originally Posted by CameraQuest View Post
He has been having great production problems. I have them in stock.

also the next shipment of Nikon / Contax Rangefinder to M adapters is in transit

https://shop.cameraquest.com/amedeo-adapters/


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Stephen

I don't see the S-mount to LTM adapter there?
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Old 06-18-2019   #7
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i just bought a 50/2.5 last weekend because it was a bargain, mint and complete set for ¥18,000 how can i resist that!?

going to write a simple review on my blog one of these days.

so far, its sharp and renders very much like most modern lenses. its not perfect and it doesnt have "character" but it is still a really good lens.

distortion is kind of high and of the pincushion type with i find unusual since most 50s have distortion of the opposite type.

contrast and saturation is great even wide-open. sharpness is ample. resolving power seems ok. it is a really nice lens. i shot with it in the last few days using my Nikon S2T (ti curtains that I modified)
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Old 06-18-2019   #8
james.liam
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Quote:
Originally Posted by WJJ3 View Post
I don't see the S-mount to LTM adapter there?
https://shop.cameraquest.com/nikon-c...leica-m-mount/

..and

https://shop.cameraquest.com/nikon-c...mount-adapter/
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Old 06-18-2019   #9
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Those are M mount not LTM.
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Old 06-18-2019   #10
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Quote:
Originally Posted by richardHaw View Post
distortion is kind of high and of the pincushion type
I did not make a test shot with the S Skopar 50mm f/2.5 for distortion, but this is with the LTM Skopar. I would not call this distortion "kind of high". Compared with the Nikkor 50mm f/2 for S-mount it is kind of low (see bottom line). When you place a ruler on the grey line on the bottom, you'll see that the distortion is next to nothing. Don't be fooled by the curved shape of the mask in the camera, the black outer line.

Erik.

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Old 06-18-2019   #11
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i shot a brick/tile wall on my way to work and i was surprised to see it not sure about the old sonnar nikkor but i dont remember it to be that noticeable. but then, i havent done the brick wall test with that lens on my reviews. maybe i should! thanks for reminding me.
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Old 06-18-2019   #12
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i just checked my review and i did shoot a brick wall in it

and its the same wall

i would say that the distortion looks similar but somehow the voigtlander felt more uncomfortable to look at. they both seem to have the pincushion type distortion thing going on.

man, i really need to go to sleep, i am forgetting what i wrote!
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Old 06-19-2019   #13
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The 50/2.5 Skopar with Amedeo adapter will not work as the rear part of the lens will hit the RF cam. I bought a couple of these lenses cheaply and converted them to M-mount. I had to trim the rear part to ensure the RF cam is cleared.
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Old 06-19-2019   #14
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Quote:
Originally Posted by kirio View Post
I had to trim the rear part to ensure the RF cam is cleared.
Yep, the S-mount Skopar won't work on a Amedeo adapter unless you trim the metal shroud on the rear of the lens.

Like this:

Down size. by Shintaro Yaginuma, on Flickr
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Old 06-19-2019   #15
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Quote:
Originally Posted by jonmanjiro View Post
Yep, the S-mount Skopar won't work on a Amedeo adapter unless you trim the metal shroud on the rear of the lens.

Like this:
Down size. by Shintaro Yaginuma, on Flickr
i am using the Skopar on my S-E amedeo
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Old 06-20-2019   #16
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Quote:
Originally Posted by richardHaw View Post
i am using the Skopar on my S-E amedeo
Are you using this combo on M-mount camera without issues with RF coupling?

I have two copies of the lens that I converted to M-mount. The rear shroud definitely needs to be trimmed.


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Old 06-20-2019   #17
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Quote:
Originally Posted by kirio View Post
Are you using this combo on M-mount camera without issues with RF coupling?

I have two copies of the lens that I converted to M-mount. The rear shroud definitely needs to be trimmed.


I am using the Nikon S-Sony E

i find that some lenses will not mate properly with the amedeos and if that happened i just pushed the cam from the inside to guide it into their slots.
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Old 06-20-2019   #18
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What does it take to trim the shroud?
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Old 06-21-2019   #19
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Quote:
Originally Posted by wjlapier View Post
What does it take to trim the shroud?
I think it would be easier with a lathe but I did not have one so it was a lot of filing and sanding. The shroud has a small screw to keep it in place. Remove the small screw then unscrew the shroud. Be careful as the shroud is what keeps the rear element in place.

The rest of the work is just filing/sanding until the correct thickness is achieved. A lot has be removed, so much so that the remainder will be very thin, almost only keeping enough material to keep the thread for screwing it back on.
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Old 06-21-2019   #20
Erik van Straten
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I really do not understand why this conversion is done. The Voigtländer Color Skopar 50mm f/2.5 in LTM is readily available. It is one of the most beautiful lenses ever made, black paint on brass, and optically it is exactly the same as the S Skopar!


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Old 06-21-2019   #21
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LTM version is more expensive. But now I know the problem with the S version I must either seek out a Nikon S2 or send the lens to DAG.

Filing the rear wouldn't be the first time I did this. Once I had to do a lot of filing to convert a Minolta 58mm f/1.2 to Nikon F mount.

Thank you everyone for the feedback and info.
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Old 06-21-2019   #22
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Quote:
Originally Posted by jonmanjiro View Post
Yep, the S-mount Skopar won't work on a Amedeo adapter unless you trim the metal shroud on the rear of the lens.

Like this:

Down size. by Shintaro Yaginuma, on Flickr
Lower right looks like Skopar lens on a S>LTM adapter. Right? And is that lens not filed down now? Or is it? I'm just trying to see what needs to be done.

My adapter is on loan currently. I have the camera. And the lens will be here shortly. Then when I have all pieces I'll understand more.
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Old 06-23-2019   #23
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Quote:
Originally Posted by wjlapier View Post
Lower right looks like Skopar lens on a S>LTM adapter. Right? And is that lens not filed down now? Or is it?

Its one of Amedeo's early S>LTM adapters, and the lens is filed down, exactly like the other lenses. If you don't file down the lens, the rear metal shroud collides with the focus cam on a rangefinder-coupled LTM or M camera.
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Old 06-23-2019   #24
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Quote:
Originally Posted by jonmanjiro View Post
Its one of Amedeo's early S>LTM adapters, and the lens is filed down, exactly like the other lenses. If you don't file down the lens, the rear metal shroud collides with the focus cam on a rangefinder-coupled LTM or M camera.
Did you do the filing or did you send them to someone?
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Old 06-23-2019   #25
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just get the lens in their proper mounts and be done with it...

i know, im getting lazy these days

a review is coming up next week.
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Voigtlander 50mm f/2.5 S Mount
Old 06-23-2019   #26
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Voigtlander 50mm f/2.5 S Mount

Quote:
Originally Posted by wjlapier View Post
Did you do the filing or did you send them to someone?

These are Shintaros lenses (and his photo). I think the adapter may have been mine originally, and I sold it to Gabor, who later sold it to Shintaro, but it is all so long ago that the details are rusty now. To answer your question, I think Shintaro used a lathe remove metal. But I agree with Rich tbh. Just get the lens in the right mount. Adapted lenses are always a compromise.
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Old 06-29-2019   #27
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with cinestill 800T and the Nikon S2T (titanium shutter)
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Old 06-29-2019   #28
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Will the S mount Skopar 50/2.5 focus properly on a Contax IIa?
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Old 06-29-2019   #29
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Quote:
Originally Posted by Bingley View Post
Will the S mount Skopar 50/2.5 focus properly on a Contax IIa?
i dont think so. at least not perfectly
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Old 06-29-2019   #30
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from my review at the blog

sometimes i wonder why they just didnt make this an internal mount like the heliar
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Old 06-30-2019   #31
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Quote:
Originally Posted by Bingley View Post
Will the S mount Skopar 50/2.5 focus properly on a Contax IIa?
The 50 Skopar is an "S" lens (meaning Nikon S-mount), unlike the 35mm and wider lenses in the range which are "SC" lenses (meaning they're designed as S-mount but you won't see the focus error when used on a Contax body), so strictly speaking, no, the Skopar 50 won't focus properly on a Contax body.

In practice you may experience a bit of front focus (around 50-100mm) at MFD and f2.5, and the front focus reduces as you stop the lens down / focus further away. If you stop the lens down to f4 to f5.6 at MFD you should be fine.


Quote:
Originally Posted by richardHaw View Post

from my review at the blog

sometimes i wonder why they just didnt make this an internal mount like the heliar
That pincushion tho I agree its a bit odd Cosina made it an external rather than an internal mount lens.
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Old 06-30-2019   #32
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If there is pincushion distortion, it is really minimal. I will make some test shots soon.

I like the external mount, but I've changed the ugly red and yellow engravings into pink, just like the old Nikkor lenses.

I love the shade.

Erik.


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Old 06-30-2019   #33
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I talked to DAG the other day and he'll machine down the rear metal shroud to fit the adapter/LTM camera. Even with the price he quoted the total is still under what the LTM version is selling for these days. The S lenses are cheap comparatively.
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Old 06-30-2019   #34
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Quote:
Originally Posted by jonmanjiro View Post
That pincushion tho I agree its a bit odd Cosina made it an external rather than an internal mount lens.
the pincushion looks ugly, right?

the old nikkor-H has a similar profile but this one looks more ugly. did you see the tiles on the wall picture at my blog?
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Old 06-30-2019   #35
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from my review at the blog.
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Old 06-30-2019   #36
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The S-Skopar is the sharpest 50mm lens I have ever seen.

The distortion Jon mentioned is next to nothing.

Nikon S2, S-Skopar 50mm f/2, 400-2TMY, printed on Adox MCC 110.

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Old 06-30-2019   #37
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from my review:

fujifilm industrial 400






took this one to see if the distortion will be obvious in real photos.


from my Bony a7

too much contrast for me but its good for some cases.
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Old 06-30-2019   #38
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Richard, I don't see much distortion in your shots. Have you ever tried a prewar Leitz Summitar?

In b+w contrast is not a problem as you can always print softer. The Summicron 50mm f/2 v4 is even contrastier than the S-Skopar.

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Old 06-30-2019   #39
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Quote:
Originally Posted by Erik van Straten View Post
Richard, I don't see much distortion in your shots. Have you ever tried a prewar Leitz Summitar?

In b+w contrast is not a problem as you can always print softer. The Summicron 50mm f/2 v4 is even contrastier than the S-Skopar.

Erik.
the distortion is most obvious on the aluminium rail on my picture of the ramen restaurant and the storefront with the coke machine
the concrete beam on the temple photo has it, too.

i can even see it in your picture near the spherical tank. (1/3) and at the bottom,too.

its not too different from a nikkor-H and may even have less of it.

i only have an elmar. i dont want to venture into leicas. nikkors are already quite expensive for me
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Old 06-30-2019   #40
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I've been using the Nikkor H since 1971. Indeed it has a tremendous lot of distortion near the borders of the picture.

You mention parts inside the picture, towards the centre. I will have a look at that; in the case of distortion I only look at the borders of the picture: there should the distortion be the worst, but probably not always.

Thank you for your reaction.

Btw, it is not a tank but an egg of a giant bird.


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