Fascinating, Paul. Except just one lens, the seller of which forewarned
me of necessity to align focus, all my lenses and cameras are spot on in
AF department. I did not perform any calibration or scientific
(semi-scientific, quarter-scientific?!) tests, but judging from rather
accurate (in case of K-7 even properly shimmed and calibrated by
testing) Katz Eye screen, my gear doesn't have any front/back focus
problems whatsoever. Curious, really.
Clarification: I am talking about center AF point.
Boris
On 11/7/2010 3:42 AM, paul stenquist wrote:
I adjusted the camera for all six of my autofocus lenses this
morning. i did it with the target I've used before. The moire method
sounded even more difficult and time consuming. In any case, five of
the six came in at 2 or 3 clicks in one direction or the other. None
were dead on at zero. That's less deviation than I saw with most of
my other Pentax DSLRs. Similar to what I saw with the K-7. One lense,
the FA 35/2 required a + 10 adjustment. I believe the K-7 number for
that lens was way up there as bell. I'll have to have a look. I
double and triple checked most of them. Checked zooms at full zoom
and half way. If there was a discrepancy, I leaned toward getting it
right at the longer focal length, since DOF is reduced. I'm now
happily dialed in.
Paul
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