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07-08-2010, 01:38 PM   #1
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Ever had a lens needing more then +10 AF adjustment?

Extreme backfocusing.

Got a cheap day lens.

did a test and the odd thing was that what i aimed at was blur while the object next to it and slightly behind was tack sharp. Only at +10 was when the sharpness was on mostly on target. I am thinking +15 would do it.

Thing is the K20D doesnt have a debug mode but if its a software feature, maybe could email pentax to see if they can widen the AF adjustment range with next update.

07-08-2010, 02:18 PM   #2
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Yes there is a K20D debug mode to do adjustments beyond +/-10. I need to find the link to the directions for you and will post it back here if someone else does not beat me to it.

EDIT- Found it. http://www.andymcm.com/?p=22

Enjoy! It works. I use it.
07-12-2010, 09:10 PM   #3
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heh, I'm at -10 for at least two lenses

With the K7 -- and I think I could use more adjustment. And even if that's optimal for those two lenses, what if I buy another lens tomorrow, and it needs way more than -10? I wish the scale had a broader spread, so that I could induce front focus and know I'd nailed it.

I've seen references to a debug hack for the K-7 also, but only for older firmware, not for version 1.03, so I don't dare try it. Also, wouldn't using it void the warranty?
07-13-2010, 12:07 AM   #4
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I'm not sure if the scale of the K10D is the same.

One of my K10D bodies needs -19 for all lenses.

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