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04-30-2008, 06:16 AM   #1
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Join Date: Apr 2008
Location: sweden
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Pentax 10-17 fisheye - Decentering problem?

I've had this lens for little less than a year and now I noticing it has uneven sharpness.

If center is properly focused then the left side is sharp and the right side less sharp but when I move the a millimeter beyond infinity the rightside get noticable sharper and the left side gets blurrier.

Also the infinity marking is way wrong. 2-3mm before the infinity marking is the real infinity at 20c. And left is 1cm beyond focus margin(!).. This can't be right...

04-30-2008, 07:46 AM   #2
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Join Date: Sep 2006
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Posts: 5,713
I would imagine that it's still under warranty. So you may as well get it fixed.

I'd live with just the infinity mark being off, but not the other problem.
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