Pentax K-1 and m42 legacy lenses

awscreo · 05-20-2016, 11:03 PM

Hi.

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.

Thanks

Adam · 05-20-2016, 11:11 PM

Yes, they will fit just fine- just like they did in the film days

Not a Number · 05-20-2016, 11:30 PM

M42 lenses were designed for full frame cameras to begin with.

pathdoc · 05-21-2016, 05:17 AM

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?

awscreo · 05-21-2016, 08:23 AM

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.

**Kerrowdown** · 05-22-2016, 12:12 AM

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.

05-20-2016, 11:03 PM	#1
awscreo Veteran Member Join Date: May 2016 Photos: Gallery \| Albums Posts: 2,722	Pentax K-1 and m42 legacy lenses Hi. 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. Thanks

05-20-2016, 11:11 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,594	Yes, they will fit just fine- just like they did in the film days Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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05-20-2016, 11:30 PM	#3
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,526	M42 lenses were designed for full frame cameras to begin with.

05-21-2016, 05:17 AM	#4
pathdoc Pentaxian Join Date: Mar 2015 Photos: Gallery \| Albums Posts: 6,381	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
awscreo Veteran Member Join Date: May 2016 Photos: Gallery \| Albums Posts: 2,722 Original Poster	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
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,815	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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