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10-04-2013, 11:14 AM   #1
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Pentax to nikon lens adapter

Hi guys,
I have a lot of pentax lenses (k mount) but no doby at the moment, and i have a nikon D70s and i want to use the pentax lenses on the nikon body.
Is there a reliable adapter to make this work?
Thanks
PS. btw i have a nice 50 1.2 lens that i want to use


Last edited by gybp; 10-04-2013 at 11:15 AM. Reason: edit
10-04-2013, 11:33 AM   #2
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Sorry, but no joy on Nikon. Nikon uses a longer registration distance (more space between the lens and sensor), so even with a flangeless adapter (which I don't think exist), your K-mount lenses wouldn't be able to focus to infinity. The only adapters which would allow you to use Pentax lenses normally have additional glass in them to refocus the lens to the proper distance, which degrades the image to the point that it's not worth it. You can get glassless adapters, but they're only useful for macro.
10-04-2013, 11:54 AM   #3
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as scratchpaddy suggests the difference in regestration distance makes infinity focus an issue, but this is not the only one. the lens mounts are close to the same diameter, and the K bayonet would as a result require an adapter that would keep the entire mount outside the nikon body, resulting in about a 14mm offset, making even MFD impossible to reach on a lot of lenses, let alone infinity.

there may be some adapters with glass correction lenses for infinity focus, but these result in magnification of the image, causing your 50/1.2 to become a 75/1.4 for example. these adapters (ihave used Nikon to pentax ones) lead to poor bleeding of colors when used wide open, but can work stopped down to give acceptable images.

you would be much better off getting a used pentax body,

or selling me the lenses
10-04-2013, 11:59 AM   #4
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lol my k20 died.. what body do you recommend these days?

10-04-2013, 12:01 PM   #5
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That question depends on your budget, of course. I would wait until next week to see what this new K-3 is all about. If nothing else, it'll drive down prices on the previous flagship models.
10-04-2013, 12:06 PM   #6
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haven't read anything about that camera... better than lets say a mikon 7100?
10-04-2013, 12:34 PM   #7
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QuoteOriginally posted by gybp Quote
haven't read anything about that camera... better than lets say a mikon 7100?
We don't know yet, just rumors. There should be an announcement soon.
10-04-2013, 12:58 PM   #8
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QuoteOriginally posted by boriscleto Quote
We don't know yet, just rumors. There should be an announcement soon.
If I may ask, how can everybody be so sure about this?

10-04-2013, 01:23 PM   #9
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QuoteOriginally posted by Giklab Quote
If I may ask, how can everybody be so sure about this?


I think somebody heard somebody else post it somewhere on a Chinese forum, which was then posted here, and then picked up by rumor sites, and the rumor sites in turn get posted back here as further proof of the original rumor, at which point it becomes fact.
10-04-2013, 01:45 PM   #10
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QuoteOriginally posted by Giklab Quote
If I may ask, how can everybody be so sure about this?
Adam has already made a K-3 entry on the Forums index page.
Pentax Forum - Camera & Photography Community - PentaxForums.com
10-04-2013, 02:25 PM   #11
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QuoteOriginally posted by Kobayashi.K Quote
Adam has already made a K-3 entry on the Forums index page.
Pentax Forum - Camera & Photography Community - PentaxForums.com
I see that there's a FF subforum as well

@scratchpaddy Thought so
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