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01-08-2010, 09:27 PM   #16
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Join Date: May 2007
Location: Singapore
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stevebrot, 15K shutter count is not particularly high.
Even before the focus issues cropping up, the K10D already had a reputation for BF/FF. Now it might not all affect everyone but from a few of my Pentax friends and I who had the K10D this issue was there. Many of us got our Pentax tech to do a focus adjustment for up to 4 lenses and it wasn't always perfect. Lenses I thought were soft and not particularly sharp with the K10D were perfect in an instant on the K20D and K-7.

We're not talking of manual focusing where you use your third party split screen to determine focus (unless you rely on the camera to confirm focus) but AF. Some of the points you raise might account for focus discrepancies but when these issues are highlighted by experienced shooters who shoot a lot and who have a plethora of quality lenses and competent in skill level, that does point to the camera rather than the points you raise.

01-08-2010, 10:22 PM   #17
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Join Date: Sep 2009
Location: Melbourne
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I agree with creampuff. My K10D developed intermittent BF issues about 12 months ago. Thought it was a lens issue, so replaced the lens with a Sigma 70-300 APO DG - no difference!

Pentax Australia performed match of lens to camera, plus sensor clean etc for $95.
Now focus is spot-on at all focal lengths with Sigma, and still sharp with Pentax 18-55.

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