What mount does this lens have?

[baachitraka]

Please help to identify this lens mount.

[domaz]

Looks like Canon FD. It's a pain to test the aperture on these lenses because of the bayonet mount.

[baachitraka]

I am trying to find OM mount lens from Vivitar 135mm tele...still no luck.

[Rick A]

Sure does look like a Canon FD mount to me.

[MattKing]

I am trying to find OM mount lens from Vivitar 135mm tele...still no luck.

How about an Olympus Zuiko 135mm lens:

http://forum.mflenses.com/olympus-zu...em-t41327.html

The 135mm f/3.5 is sharp and very compact.

[baachitraka]

I was very clear that I want only zuiko 135mm. On one bad day I was reading about Vivitar 135mm close focus then I had second thoughts. :-(

[Luc More]

Looks like Canon FD. It's a pain to test the aperture on these lenses because of the bayonet mount.

Not that hard. Unlock then turn the breech lock ring counter-clockwise then you can push the stop-down lever in same direction. On Canon lenses it stays there (for use stopped down on Macro bellows and stuff). On the picture it might be a third party lens, there's a button marked L that might have the same effect?