K5 Back Focus issue solved

Started Jun 10, 2012 | Discussions thread
DAVID MANZE
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Re: K5 Back Focus issue solved
In reply to JeffAHayes, Jun 13, 2012

Hi,

This test area/area number that comes up in mode debug may well be there to correct individual AF points independently,so for example if you have lenses that have a range of more than -10 to+10 one of the AF points could be programmed to be say, +40µ which would give you +4 additional compensation for a "rogue" lens. If you debug-adjust just, say,the extreme left point for +4,you could use that point uniquely for the problem lens without having to change the settings elsewhere!

This is just a theory and to be quite honest I've had enough AF checking with all my lenses to go down that road.

I think the debug mode is there so Pentax engineers don't have to disassemble a camera just for a calibration of the AF.
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