K5 tungsten vs daylight AF calibration?? GordonBGood, awaldram, RPulley?

Started Nov 11, 2012 | Questions thread
kitsios_spyros
Senior MemberPosts: 1,169
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Re: K5 tungsten vs daylight AF calibration?? GordonBGood, awaldram, RPulley?
In reply to GordonBGood, Nov 12, 2012

"EDIT_ADD: Note that when using an angled test with the paper target as linked, one must be careful to print that target on smooth surface photographic paper or risk the AF system locking focus on the texture of the paper, which can make the results invalid depending on the AF algorithm used. You should confirm the camera's inability to lock AF on a plain white area of the paper just above or below the black focus line for the very lowest and brightest illuminations used.

Hope this helps.

Regards, GordonBGood"

Yes, this is a very clever note! It may explain some shoots that I had to reject, as they were clearly different from a batch of shoots with the exact same conditions (AF-FA setting, distance, angle, lens FL, light intensity, light source). Thanks sharing this.

Kind Regards,

Spyros

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