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02-20-2012, 11:49 AM   #1
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focusing to infinity problems K-r

for some reason i am having trouble focusing my F-zoom 70-200 to infinity on my K-r. it has the problem especially at the 200 end.

It worked fine on my Ist*-D.

any ideas?

i was thinking of selling it and putting the money towards getting a FA 77.

Is there an easy fix for this sort of problem or is the lens/camera broken?

cheers for any responses

02-20-2012, 11:50 AM   #2
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Pentax-F 70-200mm F4-5.6 Reviews - Non-SMC Pentax Zoom Lenses - Pentax Lens Reviews & Lens Database

its this one if this helps?
02-20-2012, 01:15 PM   #3
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Try checking for FF/BF:

Fixing Front and Back Focus - Introduction -

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02-20-2012, 02:06 PM   #4
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does this move the sensor or something then? the lens wont manually focus to infinity.- even though on the focus markings it reads byond infinity.

02-20-2012, 08:47 PM   #5
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What problems are you seeing? Failing to focus, or just images not as sharp as you expect? Can you post samples? I'm guessing you are making the mistake of comapring against the istD at 100%, which is to say, you are blowing up the K-r image *much* larger. so no surprise it looks softer in comparison.

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