I recently bought this lens and I am looking to adapt it to a Nikon D3300 and i was wondering if anyone could tell me what the mount of the lens is. Thank you :)enter image description here

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1 Answer 1


It's a Contax/Yashica (C/Y) mount. From the WY Cameras identification guide,

To identify them visually, it’s a similar situation to Minolta MD lenses – look for the position of the notch cut out of one of the bayonets. On C/Y lenses, it’s on the left of the bayonet.

C/Y mount
Image of C/Y lens mount. From wycameras.com

Specifically, because of the D-shaped fixed pin next to the notched tab on the right, your lens appears to be made for Yashica bodies. I believe the position of this pin communicates maximum aperture of the lens to the camera body. Source: discussion at photrio.com

In order to adapt it to a Nikon F-mount body, because the C/Y mount registration distance (also known as flange focus distance) is shorter than the F-mount registration distance, you will need an adapter with a corrective lens in it. These types of adapters tend to reduce the image quality.

See also, Can I use lens brand X on interchangeable lens camera brand Y?

  • \$\begingroup\$ It probably is C/Y mount, but the extra "D-shaped" stationary pin just inside the notch on the photo in the OP worries me a bit. \$\endgroup\$
    – Michael C
    Commented Jul 7, 2020 at 11:21
  • \$\begingroup\$ @MichaelC Yeah, I wondered about that. I think it's for Yashica bodies, to let them know the maximum aperture of the lens. See: photrio.com/forum/threads/… (warning, painfully slow loading of this page) \$\endgroup\$
    – scottbb
    Commented Jul 7, 2020 at 18:09

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