Question to K-3 + 16-50mm f2.8. focus problem with some focus point?

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CatchAlive
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Question to K-3 + 16-50mm f2.8. focus problem with some focus point?
2 months ago

Hello!

I have a problem with my brand new 16-50. But it's not SDM!

Example: I focus using spot center focus point: ultra sharp using f2.8

If I use by example the lower right point, I can't have a sharp picture! I'm forced to use quick focus to carrect 95% of the time!!!!

And something strange, the problem seems to be less important using it with my K-5....

I have contacted Ricoh. Waiting for their answer. If you have any idea...

 CatchAlive's gear list:CatchAlive's gear list
Sigma DP2 Merrill Sigma DP3 Merrill Ricoh GR Pentax K-5 Pentax K-3 +11 more
Pentax K-3 Pentax K-5
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