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Tair2 - FS2

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03/30/2018 15:32

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Hello,

I have just bought a Tair 2 lens; one of those which were mounted on the wartime KMZ photosnipers.

My purpose is of course to take photos with that lens. For that, the first thing is to convert the 44mm screw mount into 39mm (or 42mm) to be mounted on a camera. But what about this 44mm screw? 44x1, 44x0,75, other? And does such a converter exist? I have not found any...

The second is to know precisely the distance between the lens and the film, through the original mirror cage. In other words, what is the thickness of this cage? It would greatly help to know that, if I want to put something like a Kilfitt/Novoflex/Visoflex between the lens and the body (which should be a Fed NKVD, of course!).

Thanks for your help!Smile Especially to the members who own a complete photosniper...

Amitiés. Jacques.

04/01/2018 04:55

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Many thanks, Alex.
So, as the seller told me it should be a 44mm, no doubt it's a M44x1 (and not a M46x0,75).
So, to obtain the M42 or M39, it seems that I only have the transitional solution of the T mount. I have not found any direct M44/M42 ring (or M44/M39).

So, it would be M44 female/T male, then T female/M42 male. No problem to obtain the M39 after, if necessary.

That would allow to mount the lens on my A7 to have the first trials.
Unless somebody has a better solution?

Amitiés. Jacques.

04/01/2018 15:53

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In fact, there are several solutions to go from M44 to M39... The most difficult is to find "something" in female M44!
To go further, I miss the thickness of the original photosniper mirror box. The original Visoflex I is 62,5mm thick; the FS2 one is visibly thicker ...

Jacques.

04/23/2018 11:20

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So, I have received a good part of my puzzle.
The Tair 2 is there. A beautiful and strong lens, really very well made with an helicoid precise and without any wobbles. A converter ring, specially made by rafcameras: there is no normal F44x1mm/M39x1 available. And a Visoflex I.

Alexander K. had sent me the dimensions of his reflex cage (78mm thick). It largely helped me. Thanks!

First trial on a Fed NKVD. But the position of the camera is not right with the Visoflex I. I should turn the lens plate of c.15° because the mirror of the Visoflex does not turn with its ring. Impossible. So, I will buy a Visoflex II...

No problem on the Sony 7, except some vignetting on the corners.

http://www.ussrphoto.com/UserContent/2342018_DSC00396.JPG

Perhaps it is the ring: 44/39 is quite "slopy". Anyway, another ring must be made as the actual one is 3,5mm too short to get infinity.

All that is encouraging, I think. I have ordered a "Dasco gunstock camera stabilizer" to try all the stuff... Sorry for the purists, the original FS2 will be for an other life!

Amitiés. Jacques.

05/06/2018 14:51

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This vignetting is strange! I never noticed vignetting on mine, but I have only the "reedition" from 1963, not the "real" war-time FS-2, maybe that's why.

05/27/2018 05:32

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A heavy and steady item... To be perfectly usable, I must soften the release mechanism, much too stiff. And for the moment, I have to dismount all the mess to load the camera! Not very fast!

I will post some photos made with that photosniper when I receive the appropriate converter.

Amitiés. Jacques.
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