Identifying this lens mount

[mr_tench]

Hi, can anyone tell me what camera(s) this bayonet fitting is for? It's 1 of a set of 3 Japanese made extension tubes. There is a notch in one of the bayonet flanges for the lock pin. I think it may be Minolta or Olympus but I have no camera to check for fitting. As far as I can measure with a rule the diameter is 45mm between opposing 'ears'. Thanks in advance, Roy

 

[elcabezagrande]

Kodak Retina Reflex or Voigtlander Bessamatic, I think.

 

[Dennis S]

I would think it's Minolta MD (Rokkor) as my lenses have that notch in it and with the placement of the tabs.

 

[anfenglin]

I second that. The notch in the (top) thingy is a dead giveaway.
Also see here:
http://rick_oleson.tripod.com/index-99.html

 

[John Koehrer]

With three actuating levers I doubt it's Minolta.
I'm inclined to agree with elcabezagrande and the Retina.

 

[Dennis S]

With three actuating levers I doubt it's Minolta.
I'm inclined to agree with elcabezagrande and the Retina.

Yes I checked it better and it does look like the Retina C mount with recesses for the 3 levers. The red circle is not mine as it was on a reference article.

 

[ronnies]

I think it's Contax/Yashica.

Ronnie

 

[mr_tench]

I think it's Contax/Yashica.

Ronnie

Thanks to all who have responded. I think Ronnie's answer is the most likely. I have looked at other images of Yashica/Contax mounts and the notch on the bayonet lug seems to be in the right place for a Yashica. I'm not sure what the 3rd lever nearest the notch does though. Once again thanks. Roy

 

[David Lyga]

ronnies, I believe, is correct. Although somewhat similar in that they both have notches, the Minolta mount notch is at the other end of that protrusion. Your mount is the Yashica bayonet mount. - David Lyga

 

[ronnies]

The three levers are for auto diaphragm, set aperture and maximum aperture. The third max aperture lever is needed for the aperture displays in the viewfinders.

Ronnie