FAQ: Screw Threads we use

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ChrisR
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Post by ChrisR »

Some enlarger filter threads have been added, from various sources.
I am sceptical that there is a 34.5 as well as a 35.5 thread. :-k
Many common lenses are still missing.
If you can correct or add info, please do.
Doing so by PM to me or admin would keep the forum thread length down.

cmagno
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Post by cmagno »

According the brochure about Schneider enlarging lens found here:

http://www.schneiderkreuznach.com/pdf/f ... rung_e.pdf

I believe that it's possible to update / correct the table "Screw Threads we use" with the following data:

M25mm x 0.5mm ................ Some lens of Schneider COMPONON, COMPONON-S Series (also available with LTM mount)
M32.5mm x 0.5mm ............. Schneider 100mm f/5.6 enlarger lens mount (also available with LTM mount), some lens of Schneider MAKRO-SYMMAR HM Serie
M39.0mm x 0.75mm ........... Schneider MAKRO-SYMMAR HM 180mm f/5.6
M50.0mm x 0.75mm ........... Schneider 135mm f/5.6 enlarger lens mount and other Schneider enlarging lens

Carlos Magno

adn25fr
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Post by adn25fr »

I found this topic only today, as I was searching for the compatibility of CFI Nikon and old NEO Olympus. Thanks for informations

but :
Adaptors don't seem too critical, for example a Mitutoyo screws into a C mount quite happily
Thats 26 x 0.706 into 25.4 x 0.794
It is not always true. I try one lens in 2 rings without succes now.

And my question: CFI Nikon and old NEO Olympus are M25 but if Nikon is 25 x0,75mm, how much was the old NEO?

In other words, has somebody tried to fix CFI Nikon lens in an Olympus NEO nosepiece?

genera
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Post by genera »

Here are a couple that I haven't seen listed yet.

M50 x 1.0, Leica / Wild Heerbrugg M3B, M3C, M3Z, MS5, MZ6, MZ7.5, MZ9.5
M52 x 1.0, Leica Stereo Zoom S4E, S6, S6D, S6E, S6T, S8APO

-Gene

RobertOToole
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Post by RobertOToole »

These took me awhile to get a hold of so I hope this will save someone time in the future.

All specs came from a copy of a brochure.

Enlarging lens mounting thread

M39 x 1.0

Computar DL 30mm f/2.8
Computar DL 50mm f/2.8
Computar DL 55mm f/1.9
Computar Varifocal 50-90
Computar Varifocal 105-150
Computar DL 135mm f/5.6
Computar DL 65mm f/3.5
Computar DL 80mm f/4.5
Computar DL 90mm f/4.5
Computar DL 105mm f/4.5


Enlarging lens filter threads

M43 x 0.75 Computar DL 50mm f/2.8
M43 x 0.75 Computar DL 55mm f/1.9
M43 x 0.75 Computar Varifocal 50-90
M43 x 0.75 Computar DL 135mm f/5.6
M43 x 0.75 Computar DL 65mm f/3.5
M43 x 0.75 Computar DL 80mm f/4.5
M43 x 0.75 Computar DL 90mm f/4.5
M43 x 0.75 Computar DL 105mm f/4.5

M52 x 0.75 Computar DL 30mm f/2.8

M67 x 0.75 Computar Varifocal 105-150

Ian Parkin
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Post by Ian Parkin »

Zeiss epiplans HD are 24mm x 0.75mm

Pau
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Post by Pau »

Ian Parkin wrote:Zeiss epiplans HD are 24mm x 0.75mm
The Zeiss Epiplan not HD with INKO (DIC) prism and quick mounting too, but the older INKO version without quick mount are RMS
Pau

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Scarodactyl
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Re: FAQ: Screw Threads we use

Post by Scarodactyl »

Just a quick addition, Olympus neo splan/dplan infinity metallurgical objectives have the same m26 thread as a mitutoyo. Similar styling too, which makes me wonder if they were an inspiration for everyone's favorite lwd objectives.
(A bit of a necropost but this is an evergreen thread)

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Scarodactyl
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Re: FAQ: Screw Threads we use

Post by Scarodactyl »

Not to muddy the waters, but I just got a Nikon finite m26 threaded bd nosepiece and my mitutoyos thread onto it smoothly and without issue.

ChrisR
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Re: FAQ: Screw Threads we use

Post by ChrisR »

Some do, some don't! Some "One Inch" ones are sloppy enough, too.
(I have some editing to do here)
Chris R

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Scarodactyl
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Re: FAQ: Screw Threads we use

Post by Scarodactyl »

To be more specific it's a Nikon universal rotating nosepiece with epi DIC prisms for a finite optiphot. A bit confusing since it feels unlikely that it would be a matter of them being loosey goosey with their own spec--this would have likely been one of the first implementations of it, I think. Maybe it comes down to how deep/steep the teeth are.

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