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-   -   What do I have? (http://www.rangefinderforum.com/forums/showthread.php?t=159060)

Waus 12-27-2016 00:48

What do I have?
 
I just bought some Nikon filters (ND8x, A12 & Polar)and the seller also included a light grey box with a "Nikon F M -> B" adapter? shade?







Any help would be welcome! Thanks!

jonmanjiro 12-27-2016 02:47

I just fixed up your photo links for you. Also, since the part shown is for Nikon F rather than Nikon rangefinders, I moved the thread to the Nikon Historical Society forum.

From the shape it looks like some kind of wide angle convertor (assuming there is optical glass in it), but since you're thinking its an adapter or shade I guess that assumption is incorrect.

Waus 12-27-2016 03:09

Thanks John-I'm a bit clumsy with that..
There's no optical glass in it- it's just empty...

sevo 12-27-2016 03:59

Does the wide end have an internal thread? And what are the thread diameters?

My guess is that it is (a part of) a microscope or telescope attachment.

lynnb 12-27-2016 04:12

Quote:

Originally Posted by sevo (Post 2679173)
Does the wide end have an internal thread? And what are the thread diameters?

My guess is that it is (a part of) a microscope or telescope attachment.

If it's very small, could it be an eyepiece attachment? The thread diameter/s should give a strong clue.

tunalegs 12-27-2016 04:36

According to the internet's favorite delusional used gear seller, this is a "very rare" lens hood for the 5.5cm preset macro lens, and is worth "$400". For whatever that's worth. Probably means actual value is about $40.

Edit: further research shows one alongside the lens here: http://collectiblend.com/Lenses/Niko...ro-Nikkor.html
Doesn't look like a hood to me. Maybe a reverser ring type deal for something?

sevo 12-27-2016 05:34

Quote:

Originally Posted by tunalegs (Post 2679184)
Edit: further research shows one alongside the lens here: http://collectiblend.com/Lenses/Niko...ro-Nikkor.html
Doesn't look like a hood to me. Maybe a reverser ring type deal for something?

It would not work as a hood, even less so with a 55/3.5. But that image contains some more pieces of the puzzle. I think it is a adapter/funnel piece for a (presumably 22,3mm tubus) field lens, to be used to couple the 55/3.5 to a microscope with a reversal ring. Dimensions are about right so that the 55/3.5 would pick up a 1:1 aerial image off the field lens in this setup.

Waus 12-27-2016 05:49

Thanks sevo & tunalegs! The wide-end of the adapter has an 52mm internal-mount, so (Nikon)filters fit right in.
The Westlicht auction has as dicription: "with M-B filter-ring, cap, keeper". So I guess it is a filter holder for the 5,5cm Micro-Nikkor (which I sold a month ago....)

farlymac 12-27-2016 09:01

According to "The Complete Nikon System" by Peter Braczko, "The M-B adapter prevents movement of the front lens during focusing, an important consideration when the first Micro-Nikkor is reverse-mounted on a bellows unit."

There is no photo of the adapter however, so I don't know if he is talking about the same item.

PF

sevo 12-27-2016 09:28

Quote:

Originally Posted by farlymac (Post 2679263)
According to "The Complete Nikon System" by Peter Braczko, "The M-B adapter prevents movement of the front lens during focusing, an important consideration when the first Micro-Nikkor is reverse-mounted on a bellows unit."

There is no photo of the adapter however, so I don't know if he is talking about the same item.

PF

This sounds like the description of a freewheeling reversing ring - which would be the right thing to sit between the lens and this tube when using the latter for adapting to a microscope. The inscription might mean "the M->B adapter belongs here".

nikonhswebmaster 12-27-2016 10:08

Quote:

Originally Posted by farlymac (Post 2679263)
According to "The Complete Nikon System" by Peter Braczko, "The M-B adapter prevents movement of the front lens during focusing, an important consideration when the first Micro-Nikkor is reverse-mounted on a bellows unit."

There is no photo of the adapter however, so I don't know if he is talking about the same item.

PF

It is an adapter for the original F mount micro-nikkor (not macro). That lens had a deep recessed front thread, with no outer 52mm thread.

When screwed into the front of the lens, it allows the lens to be reversed when using a reverse ring on an F bellows.

This is the second non-auto version with front threads. http://www.mir.com.my/rb/photography...dexmicrold.htm

nasmformyzombie 12-27-2016 18:46

Quote:

Originally Posted by DrMcCoy (Post 2679403)
I don't get the reference - but I'm pretty sure I want to.

Remember the old TV show 'Password'?

The host, Allen Ludden: "Two words depicting the name of a delusional internet seller of used photo gear."

Me: "____ Spacey"
You: Huh?
Me: "____ Kostner"
You: "xxxxx" (censored)
Me: "Rangefinder ______(s)"
You: Huh?
Me: "Digital _______(s)"
You: "xxxxxxx" (censored)

Put the two together and you have the name. ;)

farlymac 12-27-2016 19:09

Quote:

Originally Posted by nikonhswebmaster (Post 2679298)

It is an adapter for the original F mount micro-nikkor (not macro). That lens had a deep recessed front thread, with no outer 52mm thread.

When screwed into the front of the lens, it allows the lens to be reversed when using a reverse ring on an F bellows.

This is the second non-auto version with front threads. http://www.mir.com.my/rb/photography...dexmicrold.htm

Well, he does reference the same lens, but after reading what the "The New Nikon Compendium" by Stafford, Hillebrand, and Hauschild has to say, I believe Peter's thinking it was to prevent rotation of the lens is a non-designed side effect.

It's easy to see how it is used to mount the lens to a BR-2 ring. Surprisingly, none of the four copies of the Nikon F/Nikkormat reference guides I own have anything about the preset Micro-Nikkor, beginning instead with the Auto Micro-Nikkor, and it is not part of the EF system which is covered extensively.

The Compendium only gives a passing reference to the lens and adapter, but states the adapter was used for mounting filters (and thus, a reversing ring) since the front ring of the lens rotates to set the aperture.

PF

nikonhswebmaster 12-27-2016 21:51

Quote:

Originally Posted by farlymac (Post 2679416)
It's easy to see how it is used to mount the lens to a BR-2 ring. Surprisingly, none of the four copies of the Nikon F/Nikkormat reference guides I own have anything about the preset Micro-Nikkor, beginning instead with the Auto Micro-Nikkor, and it is not part of the EF system which is covered extensively.

Here is a set http://collectiblend.com/Lenses/Niko...ro-Nikkor.html

http://nikonfan.cocolog-nifty.com/.s...f35preseta.jpg

Honestly Peter may be right, but my understanding was the lens was not threaded 52mm, so the adapter was needed, however it seems to have been threaded so it may be to stabilize the whole thing when mounted.

This was not one of my most memorable collecting experiences, but I have a good memory for this stuff, most of the time. At any rate the adapter is for the first version of the micro.

farlymac 12-28-2016 06:03

I keep thinking I may have one of those M->B adapters around here. Stuff I get in box lots is my usual source for oddball items.

PF

Baku 12-28-2016 08:09

cool lens dear nice photography btw :) i like it

repair iphone screen

sevo 12-28-2016 09:45

Quote:

Originally Posted by farlymac (Post 2679416)
I believe Peter's thinking it was to prevent rotation of the lens is a non-designed side effect.

Well, if it goes INSIDE the lens (or rather inside the lens-integral shade) and screws into a smaller thread at the front element, it would uncouple the front of the lens from filters, bellows and the like. Which would indeed be beneficial on a lens with front aperture ring. But that would imply that the lens has a small female thread at the front element - has it?

Waus 12-28-2016 23:45

thanks for all the input! RFF is really an outstanding forum!
Unfortunately I had (a used)example-that I sold...so don't know about the femaile tread...

nikonhswebmaster 12-29-2016 03:53

Quote:

Originally Posted by sevo (Post 2679554)
Well, if it goes INSIDE the lens (or rather inside the lens-integral shade) and screws into a smaller thread at the front element, it would uncouple the front of the lens from filters, bellows and the like. Which would indeed be beneficial on a lens with front aperture ring. But that would imply that the lens has a small female thread at the front element - has it?

It does, I think 43mm as I remember.

Waus 12-29-2016 04:22

I just measured the outside of the smallest part, and I see 31mm on my micrometer.

nikonhswebmaster 12-30-2016 05:27

Quote:

Originally Posted by Waus (Post 2679770)
I just measured the outside of the smallest part, and I see 31mm on my micrometer.

Interesting, so it was only there for assembly of the lens? Not to mount a filter. I assume the adapter was a lucky after thought, but really have no actual info.

I am surprised no one on the RFF has shown us a complete set. This was supposed to be a great lens.

wes loder 12-30-2016 06:22

m-b adapter
 
The first 55mm Micro-Nikkor for the Nikon F was a preset lens. The close-down ring was also the filter-mounting ring (52mm Nikon F standard). This meant that any filter would rotate when the lens was stopped down. It also made it difficult to reverse-mount the lens on a bellows. The M-B ring screws into a smaller thread well inside the front of the lens (31mm) which does not rotate when the lens is stopped down. This allows the reverse mounting of the Micro Nikkor on a bellows and still easily stop down the aperture. The second version of the pre-set Micro Nikkor has a projecting filter thread that eliminates the problem. The M-B ring was not a good solution since over-tightening the ring and then trying to remove it could cause the lens to unscrew (oops!).
You have a very rare item. I own one and use it to adapt a telescope eyepiece to any Nikkor lens with a K-3 ring. WES

Waus 12-30-2016 10:51

Thanks again for the input!

nikonhswebmaster 12-31-2016 07:22

Quote:

Originally Posted by wes loder (Post 2680137)
This meant that any filter would rotate when the lens was stopped down. WES

That is the missing piece of information!

I could not remember why the adapter was needed.

I have handled the lens and put in an adapter, but nothing more. Any idea how many were made? Did it share elements with the rangefinder version? I cannot find a lens diagram.

nikonhswebmaster 12-31-2016 16:46

Quote:

Originally Posted by DrMcCoy (Post 2680216)
Wow - how in the world does that place stay in business. Those prices are ludicrous.

As I always said to collectors who made that comment, go buy at the cheaper table, why bother me?


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