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02-21-2012, 03:01 PM   #1
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Which adapter for Tamron SP 500

I have found a used Tamron SP 500 mirror lens I want to buy. (I know the pros and cons...and I still want it. LOL)

But exactly what designation of Adaptall do I need? There seem to be more than one type.

Thanks,
Hray

02-21-2012, 03:41 PM   #2
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Hi hray,
Take a look at this Tamron Adaptall 500mm f/8 SP Mirror (55B) Lens Reviews - Tamron Adaptall Lenses - Pentax Lens Review Database

I have the Tamron Adaptall 500mm f8 SP mirror (55B) and use an Adaptall KM mount (the full manual) although a P/KA works as well from what I have read, but vastly more expensive and seemingly harder to find. See Hin's Tech Corner: Tamron Adaptall-2 P/KA Adapter for some great info.
02-21-2012, 03:47 PM   #3
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The original Adaptall and the original Adaptall 2 are KM. The Adaptall 2 was upgraded to KA in 1983. KM Adaptalls sell for about $20. KA Adaptalls sell for $100 or more.
02-21-2012, 03:52 PM   #4
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Original Poster
Thanks for the reference to the lens review thread. Looks like the inexpensive KM Adaptall should work with this fixed f/8 lens.


Last edited by hray; 02-21-2012 at 03:56 PM. Reason: Found more info
02-21-2012, 09:01 PM   #5
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QuoteOriginally posted by hray Quote
Thanks for the reference to the lens review thread. Looks like the inexpensive KM Adaptall should work with this fixed f/8 lens.
Yep, that is the one you want!
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