Dumb question... Is "P-mount" the same as M42?

GibbyTheMole · 04-05-2011, 05:52 PM

Looking at a bellows that's "P-Mount". (not P-K, but "P"-mount.) I was thinking that P-mount was another term for standard M42 mount. Is that right?

Cheers,
Bobbo :-)

**jatrax** · 04-05-2011, 06:10 PM

Never heard it called that, but who knows. If the mount is threaded instead of some form of bayonet then it most likely is M42 screw mount. There are other screw mounts (M37, M39) but most likely it is M42. Of course the easy way to tell is to measure it.

You could also try an M42 lens to see if it fits if you have one.

Adam · 04-05-2011, 06:11 PM

Never heard of it, so I don't think so. Whoever used that designation must just be saying that it's a Pentax lens.

**Dma110** · 04-05-2011, 06:25 PM - **1 Like**

I believe back in the 70s ( God, I'm dating myself ) the standard pentax mount was called P-mount. Would be the m42

AOShep · 04-05-2011, 07:16 PM

A quick Google search results indicate the P-mount is the M42 screw mount.

RioRico · 04-05-2011, 07:26 PM

Yes, P-mount is Praktica-Pentax M42 mount. I've seen that on various T2 and other universal lens adapters, not so much on lenses themselves.

04-05-2011, 05:52 PM	#1
GibbyTheMole Veteran Member Join Date: Nov 2009 Location: Iowa Photos: Albums Posts: 2,275	Dumb question... Is "P-mount" the same as M42? Looking at a bellows that's "P-Mount". (not P-K, but "P"-mount.) I was thinking that P-mount was another term for standard M42 mount. Is that right? Cheers, Bobbo :-)

04-05-2011, 06:11 PM	#3
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,597	Never heard of it, so I don't think so. Whoever used that designation must just be saying that it's a Pentax lens. 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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04-05-2011, 06:10 PM	#2
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	Never heard it called that, but who knows. If the mount is threaded instead of some form of bayonet then it most likely is M42 screw mount. There are other screw mounts (M37, M39) but most likely it is M42. Of course the easy way to tell is to measure it. You could also try an M42 lens to see if it fits if you have one.

04-05-2011, 06:25 PM - 1 Like	#4
Dma110 Site Supporter Join Date: Mar 2011 Location: Gilbert Arizona Posts: 559	I believe back in the 70s ( God, I'm dating myself ) the standard pentax mount was called P-mount. Would be the m42

04-05-2011, 07:16 PM	#5
AOShep Senior Member Join Date: Feb 2010 Location: Eastern PA Photos: Gallery \| Albums Posts: 293	A quick Google search results indicate the P-mount is the M42 screw mount.

04-05-2011, 07:26 PM	#6
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	Yes, P-mount is Praktica-Pentax M42 mount. I've seen that on various T2 and other universal lens adapters, not so much on lenses themselves.