Zeiss Jena camera focusing problem.

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Piter_
Posts: 61
Joined: Tue Jul 16, 2019 4:26 pm

Zeiss Jena camera focusing problem.

#1 Post by Piter_ » Thu Aug 06, 2020 8:59 pm

Hi.
I am using this setup.
https://photos.app.goo.gl/GsykgXYFPWQhkmMP6
With MF-projective 4:1 (projection distance 125 mm) and Cannon 40D.
My problem that to get sharp image I have to extend sensor eyepiece distance all the way to ~160 mm.
With low magnification 6x, 3x even then I cannot get clear picture without refocusing the mic.
Why cannot I focus with. 125 mm distance? Where could be a problem?
Thanks.
Petro.

Hobbyst46
Posts: 3180
Joined: Mon Aug 21, 2017 9:02 pm

Re: Zeiss Jena camera focusing problem.

#2 Post by Hobbyst46 » Fri Aug 07, 2020 6:55 am

The MF 4:1 projektif has been mentioned in earlier posts - you might look at:
viewtopic.php?f=5&t=7871&p=71352&hilit=projektiv#p71352
I used it afocally and parfocality was OK, the FOV was somehow narrow so I put it aside.
Zeiss Standard GFL+Canon EOS-M10, Olympus VMZ stereo

Piter_
Posts: 61
Joined: Tue Jul 16, 2019 4:26 pm

Re: Zeiss Jena camera focusing problem.

#3 Post by Piter_ » Fri Aug 07, 2020 10:20 am

I think I figured out what is my problem.
http://www.microscopist.co.uk/wp-conten ... -focus.pdf

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