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07-07-2015, 11:39 PM   #1
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Join Date: Jul 2015
Location: Gstaad, Switzerland
Posts: 7
Pentax SMC 645 FA 200mm f4 won't focus to infinity

My 645 FA 200mm f4 lens won't focus to infinity. From an optics point of view i'm very happy with the lens - except when objects are far away it won't focus to infinity, it would stop at approx. 100ft. It seems like the focus ring isn't in sync with internal components focusing the lens.
Is this a common issue that can easily be resolved by opening the lens? Any ideas?


07-08-2015, 04:20 AM   #2
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Join Date: Apr 2015
Posts: 47
A service tech should be able to adjust this, but mechanical adjustment is likely to be required.

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200mm, 645d, 645z, camera, f4, f4 won't focus, fa, fa 200mm f4, focus, infinity, lens, medium format, pentax smc, smc 645 fa
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