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 An interesting experiment on the M42 mount
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dongyeob lee
ldy0618

Korea
3 Posts
Posted - Nov 30 2018 :  11:25:26 PM  Show Profile  Send ldy0618 an AOL message  Reply with Quote
hello,I'm korean who use zenit 11 and zenit e. this is about curiosity that when my zenit 11 is broken down and I got a new one.
I love zenit, but someday I want to use nikon FM2.
there is no way to recycle this broken zenit?
so I think it. (Assuming I have it) What if I transfer Zenit's M42 mount to FM2.
normally,we use adapter,for fit to flange bag.
If I change FM2 F mount(46.5mm) to M42(45.5mm),there is any problem?
or just fit without any problem?
I think there will be no problem. When I replace it with an M42 mount, Even in infinity focus.
what do you think?
xya
France
91 Posts
Posted - Dec 01 2018 :  3:18:37 PM  Show Profile  Reply with Quote
you might indeed have an infinity problem. 1mm can be a lot when it comes to focus. you can adapt lenses from a longer focal flange to a shorter one via adapters or rings. unless you are able to put the M42 mount 1mm closer to the film plane into the housing of the camera you will have problems. the problem is often the mirror which might touch the back of the lens. it's easier to buy another zenit body, they are cheap...

www.a7camera.com www.120folder.com www.instantphoto.eu

Edited by - xya on Dec 01 2018 3:19:42 PM
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Alfa2
Poland
328 Posts
Posted - Dec 06 2018 :  3:36:34 PM  Show Profile  Reply with Quote
Most of M42 lenses can be used on Nikon. They need readjusting to compensate this 1 mm of difference.
Readjusting should cause optics should be 1 mm closer to the film plane.
This readjusting is possible for most of M42 lenses.
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Vladislav Kern
Vlad
USA
4072 Posts
My Collection

Posted - Dec 06 2018 :  4:02:23 PM  Show Profile  Visit Vlad's Homepage  Reply with Quote
Also there are adapters that have optics in them, those will work. Something like this:

https://www.ebay.com/itm/B889-M42-Nikon-Camera-Adapter-Ring-with-Infinity-Focus-Glass-Connect-Converter/273597005714?hash=item3fb3a6ff92:g:I2kAAOSwh39cCMF1:rk:4:pf:0

But with cheap ones like that you will probably get cheap glass, so it may make it worse quality.. but there are higher-end adapter like that that will do a better job.

Cheers,
Vlad
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Jacques M.
France
2238 Posts
Posted - Dec 07 2018 :  03:10:14 AM  Show Profile  Reply with Quote

The problem is of course the glass.
I had such a converter Canon FD/Canon EF with poor results...

Jacques.
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Alfa2
Poland
328 Posts
Posted - Dec 08 2018 :  04:14:22 AM  Show Profile  Reply with Quote
I still have a converter Canon FD/Canon EF. It is complitely useless. It multiplies focal length by 1.6, "eats" about 2 EV light, and quality of image is much worse.
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