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02-26-2021, 05:13 AM   #1
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What mount is this?

Hello. I have bought an old lense and I don't know if the mount is Canon FD or Pentax K. Could you help me? Thanks!



02-26-2021, 05:37 AM - 1 Like   #2
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Nikon F mount, AI.
02-26-2021, 06:27 AM   #3
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+1 Nikon, , looks like the "prongs" have been cut off.

FYI
http://rick_oleson.tripod.com/index-99.html
02-26-2021, 06:35 AM   #4
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QuoteOriginally posted by marcusBMG Quote
+1 Nikon, , looks like the "prongs" have been cut off.

FYI
SLR Lens Mount Identification Guide
No, they're there.

02-26-2021, 07:26 AM   #5
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QuoteOriginally posted by boriscleto Quote
No, they're there.
Indeed they are, but you have to look carefully.

Any lens with those can only be Nikon F mount.
02-26-2021, 08:10 AM   #6
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The prongs usually look like this (pic).


They look like they've been trimmed on the OP's lens!
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02-26-2021, 08:43 AM   #7
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It's a Nikon (Nikon AI lens)

One of the quickest giveaways is the bunny ears that is near the aperture ring that only Nikon mount lenses have ( talking vintage of course ).

The second reasoning that I know it is a Nikon lens is that you can see how from the rear, on the top left, there's a raised portion of plastic ( this gives away at minimum, it is an AI spec, or Auto Indexing ).
02-26-2021, 10:06 AM   #8
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QuoteOriginally posted by marcusbmg Quote
the prongs usually look like this (pic).


They look like they've been trimmed on the op's lens!
Name:  Screenshot 2021-02-26 at 12.03.37 PM.jpg
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They don't look trimmed to me.

02-26-2021, 11:52 AM   #9
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On my phone the size and the lighting / reflection they looked trimmed. Going back and looking at the op and tilting my phone I can see they are there
02-26-2021, 01:01 PM - 1 Like   #10
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trick of the light ...
02-27-2021, 09:04 AM   #11
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I also missed the prongs at first, on a 27" 2560 x 1440 IPS screen. They are the easiest givaway. I have often wondered why Nikon fits and removes lenses the opposite way from everyone else.
02-27-2021, 03:24 PM   #12
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QuoteOriginally posted by pentasonic49 Quote
I also missed the prongs at first, on a 27" 2560 x 1440 IPS screen. They are the easiest givaway. I have often wondered why Nikon fits and removes lenses the opposite way from everyone else.
Goes back all the way when the Contax rangefinder mount was copied by Nikon for their rangefinders (also later on by Kiev) . I guess they stuck with the counter-clockwise mounting method when they made the Nikon F.
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