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04-25-2010, 05:37 PM   #16
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update.... for good measure... i re-cleaned the electrical contacts with alcohol... and even lightly scraped those 3 contacts.... i was able to register f3.5 on this 19ah lens.. but would go from 3.5 to 4.0... i gave the lens a gentle twist on the pka mount... and was able to achieve f3.5 again...
these pka adapters are a hybrid gizmo... electrical contacts combined with mechanical fasteners... i guess they're just a little tempermental.... like moe of the 3 stooges exclaimed about curly... he's 95% temper and 5% mental.... lol.......
i am excited about entering the tamron sp lens world..... regards, dave m

04-25-2010, 07:29 PM   #17
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QuoteOriginally posted by dcmsox2004 Quote
update.... for good measure... i re-cleaned the electrical contacts with alcohol... and even lightly scraped those 3 contacts.... i was able to register f3.5 on this 19ah lens.. but would go from 3.5 to 4.0... i gave the lens a gentle twist on the pka mount... and was able to achieve f3.5 again...
these pka adapters are a hybrid gizmo... electrical contacts combined with mechanical fasteners... i guess they're just a little tempermental.... like moe of the 3 stooges exclaimed about curly... he's 95% temper and 5% mental.... lol.......
i am excited about entering the tamron sp lens world..... regards, dave m
and 30+ years old in many cases
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