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**clivebennett** · 05-15-2023, 03:58 PM

Hi, I've been using this lens on my K7 for several years and, aside from minor AF hunting niggles it's been absolutely great. It suddenly occurred to me that, as it's a full frame lens, I should be able to use it on other full frame bodies. Are there any constraints on using it elsewhere, via an adapter of course, and would an ordinary PK to x adapter work - again, assuming manual focus and manual exposure? I guess I'm asking if an ordinary "dumb" PK adapter will work with this KAF2 mount lens or could it cause a problem? Example, I have a PK to L-mount adapter for my Lumix S5 - is it fair game to use this for this lens?
Thanks.

Not a Number · 05-15-2023, 05:05 PM - **1 Like**

Since the lens has an aperture ring it should not be a problem unless the adapter won't allow the lens to stop down.

**UncleVanya** · 05-15-2023, 08:33 PM - **1 Like**

Originally posted by clivebennett

Hi, I've been using this lens on my K7 for several years and, aside from minor AF hunting niggles it's been absolutely great. It suddenly occurred to me that, as it's a full frame lens, I should be able to use it on other full frame bodies. Are there any constraints on using it elsewhere, via an adapter of course, and would an ordinary PK to x adapter work - again, assuming manual focus and manual exposure? I guess I'm asking if an ordinary "dumb" PK adapter will work with this KAF2 mount lens or could it cause a problem? Example, I have a PK to L-mount adapter for my Lumix S5 - is it fair game to use this for this lens?
Thanks.

Should work fine. Focus wide open, Meter stopped down.

Sjak · 05-16-2023, 02:19 AM - **1 Like**

Originally posted by clivebennett

Hi, I've been using this lens on my K7 for several years and, aside from minor AF hunting niggles it's been absolutely great. It suddenly occurred to me that, as it's a full frame lens, I should be able to use it on other full frame bodies. Are there any constraints on using it elsewhere, via an adapter of course, and would an ordinary PK to x adapter work - again, assuming manual focus and manual exposure? I guess I'm asking if an ordinary "dumb" PK adapter will work with this KAF2 mount lens or could it cause a problem? Example, I have a PK to L-mount adapter for my Lumix S5 - is it fair game to use this for this lens?
Thanks.

There's also the Monster-adapter which allows full functionality (incl. AF) of a variety of Pentax-lenses on selected Sony cameras. I believe the adapter can only be ordered at a few select overseas locations, no European distributor as of yet.

**clivebennett** · 05-17-2023, 01:27 AM

Originally posted by Not a Number

Since the lens has an aperture ring it should not be a problem unless the adapter won't allow the lens to stop down.

Thanks very much to everyone for that advice.

05-15-2023, 03:58 PM	#1
clivebennett Site Supporter Join Date: Sep 2020 Location: South-East London Posts: 27	Pentax smc DFA 50mm f/2.8 Macro Lens Hi, I've been using this lens on my K7 for several years and, aside from minor AF hunting niggles it's been absolutely great. It suddenly occurred to me that, as it's a full frame lens, I should be able to use it on other full frame bodies. Are there any constraints on using it elsewhere, via an adapter of course, and would an ordinary PK to x adapter work - again, assuming manual focus and manual exposure? I guess I'm asking if an ordinary "dumb" PK adapter will work with this KAF2 mount lens or could it cause a problem? Example, I have a PK to L-mount adapter for my Lumix S5 - is it fair game to use this for this lens? Thanks.

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05-15-2023, 05:05 PM - 1 Like	#2
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,526	Since the lens has an aperture ring it should not be a problem unless the adapter won't allow the lens to stop down.

05-15-2023, 08:33 PM - 1 Like	#3
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,472	Originally posted by clivebennett Hi, I've been using this lens on my K7 for several years and, aside from minor AF hunting niggles it's been absolutely great. It suddenly occurred to me that, as it's a full frame lens, I should be able to use it on other full frame bodies. Are there any constraints on using it elsewhere, via an adapter of course, and would an ordinary PK to x adapter work - again, assuming manual focus and manual exposure? I guess I'm asking if an ordinary "dumb" PK adapter will work with this KAF2 mount lens or could it cause a problem? Example, I have a PK to L-mount adapter for my Lumix S5 - is it fair game to use this for this lens? Thanks. Should work fine. Focus wide open, Meter stopped down.

05-16-2023, 02:19 AM - 1 Like	#4
Sjak Senior Member Join Date: Apr 2023 Posts: 190	Originally posted by clivebennett Hi, I've been using this lens on my K7 for several years and, aside from minor AF hunting niggles it's been absolutely great. It suddenly occurred to me that, as it's a full frame lens, I should be able to use it on other full frame bodies. Are there any constraints on using it elsewhere, via an adapter of course, and would an ordinary PK to x adapter work - again, assuming manual focus and manual exposure? I guess I'm asking if an ordinary "dumb" PK adapter will work with this KAF2 mount lens or could it cause a problem? Example, I have a PK to L-mount adapter for my Lumix S5 - is it fair game to use this for this lens? Thanks. There's also the Monster-adapter which allows full functionality (incl. AF) of a variety of Pentax-lenses on selected Sony cameras. I believe the adapter can only be ordered at a few select overseas locations, no European distributor as of yet.

05-17-2023, 01:27 AM	#5
clivebennett Site Supporter Join Date: Sep 2020 Location: South-East London Posts: 27 Original Poster	Originally posted by Not a Number Since the lens has an aperture ring it should not be a problem unless the adapter won't allow the lens to stop down. Thanks very much to everyone for that advice.

Pentax smc DFA 50mm f/2.8 Macro Lens

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