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04-16-2012, 08:59 AM   #1
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Can Nikon lenses be adapted to Pentax?

Can Nikon lenses be adapted to Pentax?

04-16-2012, 09:01 AM   #2
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Actually for the MF ones (AI and non AI) a lot of them can just be mounted (though they don't lock in place completely they will focus to infinity. wouldn't use that method for a big heavy one though
04-16-2012, 09:42 AM   #3
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Yes. I bought a 24mm Nikkor lens converted to K-mount one last year from a forum member. It's all manual focus and requires use of stop down metering but, it works just fine. How you do it is not in my knowledge base but it can be done. Search this site for starters.
04-16-2012, 09:43 AM   #4
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I really will have to write that article about modding NI, OM, C/Y and Exakta lenses to PK soon.

I know of three types of MF Nikon-mounts. The easiest fits right into a PK mount, but insecurely -- see below for the fix. The next has two protrusions on the aperture (bottom) ring, what I call the "nub and arc" bits. Cut off the "nub and arc" with a Dremel, and the lens fits PK. The last has a skirt extending fully on the aperture ring; it mounts on PK, but jams against the camera mount. Remove the screws holding the lens base, insert little 1mm-1.5mm-thick washers under the base, then screw it down.

For security: Same as with OM and C/Y lenses, just drill a hole or cut a slot for the PK lens-lock pin to engage. The hole should be about 1.5mm wide and deep. The slot should be be about 1.5mm wide and deep, and about 6mm long. I've modded a number of lenses and haven't lost one yet! As mentioned, do't do this with heavy lenses, like over 450g / 16oz. A 400g limit would be even better. Have fun!

04-16-2012, 10:10 AM   #5
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QuoteOriginally posted by RioRico Quote
I really will have to write that article about modding NI, OM, C/Y and Exakta lenses to PK soon.
Please do! I have the Dremel ready.
04-16-2012, 10:21 AM   #6
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I was thinking the Nikon 14-24 legend. How would that mount up? Manual is fine.
04-16-2012, 10:35 AM   #7
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Not sure I'd want to mod that lens and kill it's value. the lost value would pay for a good used D90 to use it on. heck it would probably lose enough value to by a D7000 to use it on.
I don't think I'd take a dremel to any $2000 lens
04-16-2012, 11:53 AM   #8
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QuoteOriginally posted by eddie1960 Quote
Not sure I'd want to mod that lens and kill it's value...
I don't think I'd take a dremel to any $2000 lens
I agree. My first N/AI mod a couple years ago was a Nikkor 85/2 that cost me US$9 but could have sold more recently for many times that. I'd thought at the time of selling rather than modding, but I didn't know if I'd have raised enough to buy anything similar.

More valuable lenses should NOT be chopped unless we intend to live with them forever. Remember, forever is a long time, except in politics.

04-16-2012, 11:58 AM   #9
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QuoteOriginally posted by RioRico Quote
I agree. My first N/AI mod a couple years ago was a Nikkor 85/2 that cost me US$9 but could have sold more recently for many times that. I'd thought at the time of selling rather than modding, but I didn't know if I'd have raised enough to buy anything similar.

More valuable lenses should NOT be chopped unless we intend to live with them forever. Remember, forever is a long time, except in politics.
ugh that hurts, pretty sure you could get in the 250-300 range for it enough for a comparable M series or the samyang 1.4 with the A setting
04-16-2012, 12:08 PM   #10
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QuoteOriginally posted by eddie1960 Quote
QuoteOriginally posted by RioRico:
I agree. My first N/AI mod a couple years ago was a Nikkor 85/2 that cost me US$9 but could have sold more recently for many times that. I'd thought at the time of selling rather than modding, but I didn't know if I'd have raised enough to buy anything similar.
ugh that hurts, pretty sure you could get in the 250-300 range for it enough for a comparable M series or the samyang 1.4 with the A setting
I did the mod in 2010 when N/AI prices were low and fast Pentaxable 85s weren't cheap. Anyway, I'm happy with the lens and the mod. I just wouldn't do it again.
04-16-2012, 12:34 PM   #11
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Not having any current 85's in the lineup (never mind the 2 that was the norm before) has made any Pentax 865 more expensive than it might be if there were modern alternatives
same with AF 24 and 28 mm lenses (and even the A counterparts) even though the 28's were mass produced unlike 85's
135 is another problem spot in primes where is the fast and affordable version (f2.5 and 3.5or 4) particularly given this is the 200mm equivalent
I don't mid MF and like hunting down lenses that cost me less than the market price in dusty old shops but as the # of users expand deals are getting harder to find, and I wouldn't mind a decent cheapish AF prime or 2 (I'll probably buy the da50 1.8 when it comes)
04-16-2012, 01:13 PM   #12
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Check out the lens adapters at:

http://www.fotodiox.com/index.php?cPath=21
04-16-2012, 01:18 PM   #13
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Nikon F lens to Pentax K-mount Fotodiox Professional Photography Supplies and Equipment
04-16-2012, 01:27 PM   #14
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QuoteOriginally posted by andygonza Quote
The problem with the adaptor is mainly this part:

<This Adaptor has a built-in 1.4x Multi-Coated Focus Correction lens to adjust for infinity focus, the glass element can be removed for macro photography (for instructions on how to remove the glass element click here)>

Since the adaptor involves a glass element, it will likely reduce the quality of the lens hence images it produces. Modifying the Nikon mount will solve that issue as you don't need an optical adaptor between the Nikon lens and Pentax body.
04-17-2012, 04:35 AM   #15
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Some AF lenses can be mounted as well without any modification needed, I used my Nikkor AF 105/2.8 on K20d without any troubles for some street photos. Impressive lens.
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