Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
07-08-2010, 01:38 PM   #1
Veteran Member
Reportage's Avatar

Join Date: Feb 2009
Photos: Gallery
Posts: 739
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
Loyal Site Supporter
imtheguy's Avatar

Join Date: Mar 2009
Location: Virginia Beach
Photos: Gallery | Albums
Posts: 2,950
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.

Enjoy! It works. I use it.
07-12-2010, 09:10 PM   #3
Veteran Member

Join Date: Jul 2010
Location: Flushing NY
Photos: Albums
Posts: 412
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

Join Date: Feb 2009
Location: Alameda, CA
Posts: 3,198
I'm not sure if the scale of the K10D is the same.

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


  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
af, k-mount, lens, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Has anyone bumped up against the 20 lens limit for AF adjustment? G_Money Pentax DSLR Discussion 11 05-27-2010 06:59 PM
Lens Focus Adjustment and Pentax F 1.7x AF TC netuser Troubleshooting and Beginner Help 2 05-21-2010 07:25 AM
AF adjustment for third party lens? RTogog Pentax DSLR Discussion 10 03-10-2010 03:12 PM
Factory Adjustment of Lens to Body ? seacapt Pentax SLR Lens Discussion 16 11-12-2009 06:32 PM
Needing help with mystery lens mr tibbs Pentax SLR Lens Discussion 9 04-25-2009 02:07 AM

All times are GMT -7. The time now is 07:50 PM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]