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biotar 58mm mount type
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PostPosted: Sat Nov 25, 2017 2:19 pm    Post subject: biotar 58mm mount type Reply with quote

Hi ,
I have bought this biotar 58mm f2.0 nr.3334326, black early serie.
I have a doubt about its mount type. I measured its thread and is diameter=39.85mm, pitch=~1mm. (see pictures)
This is not a a m42x1 (my takumar has thread diameter=41.90) nor a M39x1 (my schneider-Kreuznach has thread diameter=38.90).
What is it then and on which kind of camera was builded for? Is it for Praktiflex M40×1 thread?
Thanks in advance

PostPosted: Sat Nov 25, 2017 5:44 pm    Post subject: Reply with quote

Praktiflex -> Yes