DA 21mm f3.2, first ride

Started May 1, 2012 | Discussions thread
Veteran MemberPosts: 8,060Gear list
Re: DA 21mm f3.2, first ride
In reply to Wayne Lee, May 2, 2012

Wayne Lee wrote:

Any idea if this happens when using a K-01? Is it a lens issue or PDAF issue?

I believe it is programmed per-camera, to a greater or lesser degree of sophistication. It's not something the lens does. This behaviour was noticeable on my K10d, but it has really not been on my K-5. I would only investigate it, if there was a clear-cut and consistent focusing error. And I would not expect it to apply to Live View autofocus.

My only reason for mentioning this, is that people quite often fine-tune their PDAF using test charts focused at close distances using a wide aperture setting - precisely the test conditions which would have led to systematic mis- adjustment in the case of this same lens on (for example) my K10d, if one had not made due allowance for the "focus step" in one's procedure.


 richardplondon's gear list:richardplondon's gear list
Panasonic Lumix DMC-LX1 Pentax K-5 Sigma 10-20mm F4-5.6 EX DC HSM Pentax smc DA 21mm F3.2 AL Limited Pentax smc DA 70mm F2.4 AL Limited +7 more
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