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08-05-2011, 07:55 AM   #1
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Tamron Adaptall autofocus?

I'm looking for a 300mm f2.8 prime lens and wanted to know if the Tamron Adaptall will

1-allow autofocus
2-allow "A" setting

or does it need to be a Pentax lens or ?

Thanks

08-05-2011, 08:34 AM   #2
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The adaptall system was for manual focus only, but one with an A setting was made. You will be able to use a manual focus lens with an A setting on all Pentax Auto focus cameras in manual focus mode. To get AF you will need an AF lens or the very expensive pentax AF adapter.
08-05-2011, 11:24 AM   #3
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If your camera has catch-in-focus, you can set it to AF.S and the shutter will only release when in focus, but will still be manual.
08-05-2011, 01:17 PM   #4
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... and to use the A setting, you need a PKA adapter.




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