DA 21mm f3.2, first ride

Started May 1, 2012 | Discussions thread
richardplondon
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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.

RP

 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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