Can I use the first generation Adaptall adapter on an Adaptall-2 lens?

GibbyTheMole · 04-11-2011, 03:35 PM

Just wonderin'...

Bobbo :-)

Ole · 04-11-2011, 04:23 PM

I'm pretty sure that the answer is no, you can't.

rhodopsin · 04-11-2011, 04:54 PM

I have some old AD1 adapters. I have been wondering the same thing. DOH!

now I realize I have some AD2 lenses, so I can try it...later.

I'm thinking AD2 mounts probably work on AD1 lenses for backward compatibility while losing newer AD2 functions retain AD1 functionality, the other way round I'm not so sure, yet.

Vranx · 12-12-2011, 02:22 AM

Originally posted by rhodopsin

I have some old AD1 adapters. I have been wondering the same thing. DOH!

now I realize I have some AD2 lenses, so I can try it...later.

I'm thinking AD2 mounts probably work on AD1 lenses for backward compatibility while losing newer AD2 functions retain AD1 functionality, the other way round I'm not so sure, yet.

Did you try it? What's the result? I have an AD1 adapter, but Ad2 lenses are more numerous (and might be of better quality).

Sorry for bringing this back to life, but better than a new thread???

Thanks in advance!

excanonfd · 12-12-2011, 07:33 PM - **1 Like**

Tamron Adaptall and Adaptall-2 lenses and mounts are interchangeable. Introduction of Adaptall-2 brought PK/A functions to Adaptall and Adaptall-2 lenses, if there was either f32/A or an AE position on the aperture ring of the lens. All Adaptall-2 lenses has f32/A position, some Adaptall lenses had AE position, these lenses when coupled with an Adaptall-2 PK/A adapter will give you equivalent automation as a Pentax A series lenses. The Adaptall lenses without either of those markings on the aperture ring would be limited to PK/M automation.

Stone G. · 12-13-2011, 03:38 PM - **1 Like**

You can. I recently bought an Adaptall Custom Mount just out of curiosity and tried it on my Adaptall-2 lenses. It worked just fine. You may see a bit more in the Adaptall Lens Club:

https://www.pentaxforums.com/forums/lens-clubs/59769-adaptall-mount-club-tamr...ml#post1638347

04-11-2011, 03:35 PM	#1
GibbyTheMole Veteran Member Join Date: Nov 2009 Location: Iowa Photos: Albums Posts: 2,275	Can I use the first generation Adaptall adapter on an Adaptall-2 lens? Just wonderin'... Bobbo :-)

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04-11-2011, 04:23 PM	#2
Ole Administrator Join Date: Sep 2006 Location: Copenhagen, Denmark Photos: Gallery \| Albums Posts: 4,408	I'm pretty sure that the answer is no, you can't.

04-11-2011, 04:54 PM	#3
rhodopsin Veteran Member Join Date: Dec 2009 Location: Deep Forest Posts: 643	I have some old AD1 adapters. I have been wondering the same thing. DOH! now I realize I have some AD2 lenses, so I can try it...later. I'm thinking AD2 mounts probably work on AD1 lenses for backward compatibility while losing newer AD2 functions retain AD1 functionality, the other way round I'm not so sure, yet.

12-12-2011, 02:22 AM	#4
Vranx Senior Member Join Date: Sep 2009 Location: Beautiful Bavaria :-) Posts: 123	Originally posted by rhodopsin I have some old AD1 adapters. I have been wondering the same thing. DOH! now I realize I have some AD2 lenses, so I can try it...later. I'm thinking AD2 mounts probably work on AD1 lenses for backward compatibility while losing newer AD2 functions retain AD1 functionality, the other way round I'm not so sure, yet. Did you try it? What's the result? I have an AD1 adapter, but Ad2 lenses are more numerous (and might be of better quality). Sorry for bringing this back to life, but better than a new thread??? Thanks in advance!

12-12-2011, 07:33 PM - 1 Like	#5
excanonfd Veteran Member Join Date: Jan 2010 Location: Vancouver, BC Posts: 1,421	Tamron Adaptall and Adaptall-2 lenses and mounts are interchangeable. Introduction of Adaptall-2 brought PK/A functions to Adaptall and Adaptall-2 lenses, if there was either f32/A or an AE position on the aperture ring of the lens. All Adaptall-2 lenses has f32/A position, some Adaptall lenses had AE position, these lenses when coupled with an Adaptall-2 PK/A adapter will give you equivalent automation as a Pentax A series lenses. The Adaptall lenses without either of those markings on the aperture ring would be limited to PK/M automation.

12-13-2011, 03:38 PM - 1 Like	#6
Stone G. Pentaxian Join Date: Jun 2010 Location: North Zealand, Denmark Photos: Gallery \| Albums Posts: 1,516	You can. I recently bought an Adaptall Custom Mount just out of curiosity and tried it on my Adaptall-2 lenses. It worked just fine. You may see a bit more in the Adaptall Lens Club: https://www.pentaxforums.com/forums/lens-clubs/59769-adaptall-mount-club-tamr...ml#post1638347

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