What do I have?

[Waus]

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]

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]

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

 

[sevo]

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]

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]

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/Nikon/55mm-f3.5-Micro-Nikkor.html
Doesn't look like a hood to me. Maybe a reverser ring type deal for something?

 

[sevo]

Edit: further research shows one alongside the lens here: http://collectiblend.com/Lenses/Nikon/55mm-f3.5-Micro-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]

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]

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]

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]

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/photograph...koresources/6070nikkor/micro/indexmicrold.htm

 

[nasmformyzombie]

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]

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/photograph...koresources/6070nikkor/micro/indexmicrold.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]

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/Nikon/55mm-f3.5-Micro-Nikkor.html

http://nikonfan.cocolog-nifty.com/....ized/2007/08/15/micronikkor55cmf35preseta.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]

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]

cool lens dear nice photography btw 🙂 i like it

repair iphone screen

 

[sevo]

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]

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]

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]

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