ISCO OPTIC CINELUX AV 200 - 300 f/ 3.5 MC

[Lucse]

Hi, this is my first post on this site. I apologize that I write it in English but I am from Belgium and my German is rather lousy.

I came across this thread and I hope somebody can help me.
I had the luck to buy four of these lenses and I am planning to adapt one of them to my camera (a Sony alpha 7II).

For this purpose I am going to use an old beaten up Soligor 350mm f/5.6 lens that looks to be perfect for this.
That way I will be able to use the aperture of that lens as well, I reckon.

The only thing I would like to know though, that's the distance the lens has to have from the camera-mount at infinity.
Can anybody tell me this 'exactly'?
Thanks in advance for all the possible help.

See this picture:

[uchris]

I can not tell you exactly, since it depends on the focal length a little bit. So I tested it for both ends of the focal range. I got 48.5 mm - 50.0 mm measured from the back of the metal tubus of the lense to the mount of the camera. You can add approximately 5.0 mm to get the distance between the back lens surface the mount.

[uchris]

Übrigens sieht es jetzt auch nicht mehr ganz so wild aus:

[Lucse]

Thanks a lot for your reply.
Your lens looks indeed very good with those smaller screws.

Can you do me one last favor please, just to be sure, and measure the distance between the two red lines (as I drew them on the picture) while the lens is at infinity (at it's shortest, of course).
That should be 148,5 to 150mm right?

One more question I wonder about:
Do you get vignetting with this lens? I ask this because the diameter of the last glass is only 23mm. My aperture will be just behind it and is 26mm in diameter.
But theoretically both those diameters are too small according to me. Hence my question about the vignetting.