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Old May 10, 2013, 7:34 PM   #1
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Default Tamron Lens Adaptall mount

Have a Tamron lens coming (500mm Mirror) that is suppose to be adaptall mount (but it is coming with a canon).
Do I just need to get a adaptall to PK mount for this?
Are any better than others, as I see them for about $13 on eBay.

Any useful info. you can me?
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Old May 11, 2013, 8:11 PM   #2
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yes just an adaptall mount for Pentax.

Pictures are of a Tamron lens with adaptall mount attached and one with the mount detached.

It attaches to the lens is just like a bayonet mount for a lens .


In normal use the adaptall mount stays on the lens and it behaves just like a normal K mount lens.
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Last edited by philneast; May 11, 2013 at 8:16 PM.
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Old May 12, 2013, 1:11 PM   #3
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Quote:
Originally Posted by fofa View Post
Have a Tamron lens coming (500mm Mirror) that is suppose to be adaptall mount (but it is coming with a canon).
Do I just need to get a adaptall to PK mount for this?
Are any better than others, as I see them for about $13 on eBay.

Any useful info. you can me?
Hi,

There are two types

1. PK manual like the one illustrated above in Phil's post

2. PKA which has contacts that allows the camera to read lens parameters, and acts in effect like a Pentax A lens

The latter ones are pretty scarce, and can be quite pricey. ... Jack.

PS this is the PKA model ... http://www.ebay.co.uk/itm/Genuine-Ta...item1c3284f123

Last edited by jachol; May 12, 2013 at 1:26 PM. Reason: add info
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Old May 13, 2013, 10:28 AM   #4
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The mirror is a fixed aperture so a PKA would be a waste of money (the one I bought turned out to be anyway as it has been falling apart ever since but that is another story). Adaptalls are really easy to use once you get used to it. But do watch that the adapter is properly seated. I have had issues with them not staying on tight so that when the focus ring is turned the lens moves in the mount. Can lead to a lens falling off the camera. Enjoy the new glass!

Fotodiox also makes one for Pentax which i have not tried yet. Not sure if it has the pin needed to control the aperture (which would mean focusing stopped down would be near impossible) but on a mirror that is not needed and they stuff they make is quite good.
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Old May 13, 2013, 11:41 AM   #5
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OK it says it is an Adaptall-2 mount.
Is there differences?

Thanks for the responses so far. It helps.
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Old May 14, 2013, 5:24 AM   #6
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Quote:
Originally Posted by fofa View Post
OK it says it is an Adaptall-2 mount.
Is there differences?

Thanks for the responses so far. It helps.
Adaptall -2 mount should be fine should be fine ... I have several Tamron lenses

a mixture of the earlier adaptall, and the later adaptall -2, I use the adaptall-2

mount with all of them, and never had a problem.

Jelow made a good point the ... you'd waste money buying one to use with a

fixed aperture lens ... Jack.
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Old May 21, 2013, 12:39 PM   #7
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What ever adapter you use, make sure that it will allow the lens can focus to infinity. There are some adapters that don't allow this.
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Old May 21, 2013, 12:53 PM   #8
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What ever adapter you use, make sure that it will allow the lens can focus to infinity. There are some adapters that don't allow this.
Hi Mito,

Infinity focus isn't a problem with the Tamron mounts, they were made specifically by Tamron to match their lenses to most makes of camera (They are not third party devices where the IF problem can arise). ... Jack
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Old May 21, 2013, 2:46 PM   #9
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Here's a good resource for Tamron Adaptall, Adaptall-2 and Adapt-A-Matic...

http://www.adaptall-2.org/index.html

Also, KEH is a good resource for mounts... They've got one for Pentax K, 4th
from the top...

http://www.keh.com/search?store=came...price=0&r=SE&e
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Last edited by Wizzard0003; May 21, 2013 at 2:51 PM.
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