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04-25-2009, 05:27 PM   #1
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Location: No. Colorado
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Focusing issues, Pentax 80-320 w/K20D

I am having some focus issues with my Pentax FA 80-320mm lens. I have tried adjusting the AF, but it does not look any better. I have tried sample shots from +10 to -10 and none of them are in there.

Is anybody else out there using this combo? Do you have focus issues?

I have had this lens for several years, and put a lot of miles on it with my ZX-7, so I am not above thinking there may be an issue with the lens itself. Any suggestions on how to check it out?

I appreciate any help offered.

04-26-2009, 09:12 AM   #2
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No point messing with focus adjustment until you've tested eith a good chart to determine in which direction it is out, if indeed that is the problem.
04-27-2009, 04:08 PM   #3
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After messing with it some more yesterday I am convinced the lens itself is out of whack. I could not get any sharp focused shots, AF or manual.

I have had this lens for many years, and carried it all over the state, so it would not surprise me if the issues is the lens. It was not a high dollar lens to begin with, and I never blew up any film shots I had taken with it, so there is good potential it has always been soft on the focus.

Now I need to convince my wife that a good lens is needed. She does not understand priorities sometimes.
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