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05-20-2016, 11:03 PM   #1

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Pentax K-1 and m42 legacy lenses


I'm thinking about selling some of my gear (including a camera) and getting a Pentax K-1 when it's available. I have a bunch of M42 legacy lenses, would I be able to adapt them to K-1? I know they'll work with the apsc models, but the adaptor seems recessed into the body, and I was wandering if it'd have a chance to damage the mirror (I'd imagine there's less free space behind the lens on a full frame camera). It'd be cool if I could use my legacy glass though, so I'd have something to shoot with right away.


05-20-2016, 11:11 PM   #2
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Yes, they will fit just fine- just like they did in the film days

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05-20-2016, 11:30 PM   #3
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M42 lenses were designed for full frame cameras to begin with.
05-21-2016, 05:17 AM   #4
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I think the issue the OP is worried about is rearward protrusion into the mirror box. AFAIK this hasn't been a problem since before the Spotmatic era. Canon FF cameras have this issue (because the registry distance is shorter IIRC) but the K1 should be immune.

Anyone shot a hot 50mm 1.4 Super Tak on the K1 and can confirm?

05-21-2016, 08:23 AM   #5

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Great to hear I did have Canon in mind when I asked the question, the EF-S lenses can damage the mirror because they protrude too far into the body, so seeing that the m42-pentax adapter had me a bit worried. Thank you for info though, more reasons to get a K1)

BTW, i did post this in welcome thread by accident, meant to post in DSLR discussions, but website took me to this thread by default after logging in.
05-22-2016, 12:12 AM   #6
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Welcome to the forum, legacy glass is just one of the many joys of Pentax ownership.

Another at the moment... seems to be my K1.

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