Anyone Own a 3M-5A 500mm f8 Mirror

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blackdog

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Carl
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Hi
It's my first post so apologies in advance if a trip over a forum convention or two.

I've just bought a 3M-5A 500mm f8 Mirror but there's some confusion over the mount. Lots of places on the net refer to this lens as having an M42 mount, however the seller and a few other places say its a T2.

If anyone owns one, could they give me the definitive on which it is. (Assuming they weren't made in both mounts)

Thanks
 
I always hate it when I search for problem and find unanswered threads so..

The lens is M42 (or according to the manual occasionally M39).

Mine is M42 , weighs an ton and is a real gem.
 
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