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geekette · 04-12-2011, 06:06 PM

Maybe I should consider the M42 lenses becasue there are so many adapters for various cameras? I heard I could even use these lenses on Nikons

Adam · 04-12-2011, 06:17 PM

They work just like any other lens- here are the instructions: https://www.pentaxforums.com/forums/pentax-lens-articles/110657-how-use-manua...7-k-x-etc.html

The adapter is "lossless" if you will.

**boriscleto** · 04-12-2011, 06:18 PM

M42 lenses can not be used on Nikon without optical correction. Without optical correction you lose infinity focus.

You can use M42 without optical correction on Pentax, Yashica/Contax, Minolta MD, Minolta A, Konica, Canon FD, Canon EF, 4/3, m4/3, Sony NEX...anything with a registration distance of 45.5mm or less.

geekette · 04-12-2011, 07:21 PM

Wow, so should I just be investing in M42 lenses? I am just starting.. bought a few K-mount lenses but I can sell them.

I have the Pentax-M 50mm/f1.4 , Pentax K 55mm/f1.8 and the Pentax K 35mm/f3.5

**stevebrot** · 04-12-2011, 07:57 PM

Originally posted by geekette

Wow, so should I just be investing in M42 lenses? I am just starting.. bought a few K-mount lenses but I can sell them.

I have the Pentax-M 50mm/f1.4 , Pentax K 55mm/f1.8 and the Pentax K 35mm/f3.5

K-mount lenses can be adapted to many of the same cameras.

Your current collection contains some great glass.

Steve

Chex · 04-12-2011, 08:34 PM

There are lots of great M42 lenses, I am loving my SMC takumars 28mm/55mm/200mm and a 2X Teleconverter. I'm having focal point issues with the K-5's viewfinder.. but that is not the fault of the lens. For great IQ I would take my SMC Tak's over my DA 18-135mm any day!

Nesster · 04-13-2011, 03:20 AM

Gee, I assumed this question was about M42 on K Film cameras.

My experience is that the M42 thing is actually better on all the manual focus Pentax cameras, as these meter better and more reliably than the dSLRs when used this way. In fact, throw one on an aperture priority Pentax, and except for having to stop down by hand, you're good to go!

04-12-2011, 06:06 PM	#1
geekette Veteran Member Join Date: Apr 2011 Location: Texas Photos: Gallery \| Albums Posts: 528	How well do M42 lenses work on K mount pentax cameras? Maybe I should consider the M42 lenses becasue there are so many adapters for various cameras? I heard I could even use these lenses on Nikons

04-12-2011, 06:17 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 43,226	They work just like any other lens- here are the instructions: https://www.pentaxforums.com/forums/pentax-lens-articles/110657-how-use-manua...7-k-x-etc.html The adapter is "lossless" if you will. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com's high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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04-12-2011, 06:18 PM	#3
boriscleto Site Supporter Join Date: Dec 2009 Location: Liverpool, NY Photos: Gallery Posts: 12,872	M42 lenses can not be used on Nikon without optical correction. Without optical correction you lose infinity focus. You can use M42 without optical correction on Pentax, Yashica/Contax, Minolta MD, Minolta A, Konica, Canon FD, Canon EF, 4/3, m4/3, Sony NEX...anything with a registration distance of 45.5mm or less.

04-12-2011, 07:21 PM	#4
geekette Veteran Member Join Date: Apr 2011 Location: Texas Photos: Gallery \| Albums Posts: 528 Original Poster	Wow, so should I just be investing in M42 lenses? I am just starting.. bought a few K-mount lenses but I can sell them. I have the Pentax-M 50mm/f1.4 , Pentax K 55mm/f1.8 and the Pentax K 35mm/f3.5

04-12-2011, 07:57 PM	#5
stevebrot Site Supporter Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 27,474	Originally posted by geekette Wow, so should I just be investing in M42 lenses? I am just starting.. bought a few K-mount lenses but I can sell them. I have the Pentax-M 50mm/f1.4 , Pentax K 55mm/f1.8 and the Pentax K 35mm/f3.5 K-mount lenses can be adapted to many of the same cameras. Your current collection contains some great glass. Steve

04-12-2011, 08:34 PM	#6
Chex Veteran Member Join Date: Feb 2011 Location: The 'Stoke, British Columbia Photos: Gallery Posts: 1,700	There are lots of great M42 lenses, I am loving my SMC takumars 28mm/55mm/200mm and a 2X Teleconverter. I'm having focal point issues with the K-5's viewfinder.. but that is not the fault of the lens. For great IQ I would take my SMC Tak's over my DA 18-135mm any day!

04-13-2011, 03:20 AM	#7
Nesster Veteran Member Join Date: Oct 2006 Location: NJ USA Photos: Gallery Posts: 13,047	Gee, I assumed this question was about M42 on K Film cameras. My experience is that the M42 thing is actually better on all the manual focus Pentax cameras, as these meter better and more reliably than the dSLRs when used this way. In fact, throw one on an aperture priority Pentax, and except for having to stop down by hand, you're good to go!

How well do M42 lenses work on K mount pentax cameras?

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