Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
08-27-2009, 12:40 PM   #1
Site Supporter




Join Date: Jul 2009
Location: Minnesota
Posts: 571
Please Help me understand AF Adjustment on K20D

Okay I did something stupid: I did not leave well enough alone.
I figured, the AF adjust feature is a neat sounding thing, lets get all my lenses so that they are focusing at exactly the right spot.

So I set up the batteries on the table outside in the sunlight. I used my FA43 set at 1.9 with SR off. My "control" shots came very close to being spot on. Slightly front focused. (By this I mean the camera focused slightly in front of the target. Am I using the terminology right?)

This is where it gets weird. Small AF focus adjustment to the + OR - BOTH brought the focus point closer to the camera -- away from the target. A -10 brings the focus point close to the target but still not as close as before I started.

Now for the really weird part. I figured okay this is crazy, I want to go back to the way things were before I started this mess. But now when I set AF adjust to 0 or even turn of AF adjust completely, the camera focuses WAY in front of the target.

BTW, all adjustments were to the "Apply One." I did not touch the "Apply All."

Please help me understand whats going on or what I am doing wrong. Thanks.

08-27-2009, 02:48 PM   #2
Loyal Site Supporter
blackcloudbrew's Avatar

Join Date: Mar 2009
Location: Cotati, California USA
Photos: Gallery | Albums
Posts: 3,816
Oh boy. I sure want to see how this get's answered. Been thinking to try this myself.

I'd only ask if you'd tried the menu reset functions, as in returning menus back to default settings.
08-27-2009, 04:47 PM   #3
Pentaxian
Wheatfield's Avatar

Join Date: Apr 2008
Location: The wheatfields of Canada
Posts: 10,132
Just a wild guess, but I'm wondering if the problem isn't your test bed. The AF sensor is seeing a much bigger part of the screen than what the indicator light sees.
08-27-2009, 04:57 PM   #4
Site Supporter




Join Date: Jul 2009
Location: Minnesota
Posts: 571
Original Poster
QuoteOriginally posted by blackcloudbrew Quote
Oh boy. I sure want to see how this get's answered. Been thinking to try this myself.

I'd only ask if you'd tried the menu reset functions, as in returning menus back to default settings.
I have not reset the menu to default settings. I am giving it a little time to try and figure out what is going on, so I can understand. In the end, though, I will reset to defaults and if that doesn't fix things than that would really stink.

QuoteOriginally posted by Wheatfield Quote
Just a wild guess, but I'm wondering if the problem isn't your test bed. The AF sensor is seeing a much bigger part of the screen than what the indicator light sees.
That is a very good point. I thought that could be a problem, so I then started taking pictures of some paving stones in the backyard. They are 1 ft by 1 ft patio stones that are very textured. I took shots of those at roughly 45 degrees aiming at the seem between two stones. The same focusing behavior was demonstrated clearly.

On another note, I have been using center point focusing for all the test shots.

Reply

Bookmarks
  • 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!
adjustment, af, af adjustment, camera, focus, front, pentax help, photography, please, spot, target
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
K20d - I don't understand auto ISO Rev Andy Pentax DSLR Discussion 16 04-16-2010 05:09 PM
K20D AF Adjustment woof Pentax DSLR Discussion 4 12-28-2009 11:19 AM
AF adjustment (K20D) WMBP Pentax DSLR Discussion 12 05-25-2009 03:58 AM
Pls help me understand noise in K100D vs K20D! HermanLee Pentax DSLR Discussion 14 02-26-2009 09:07 AM
K20D AF adjustment ? Confused Pentax DSLR Discussion 5 01-25-2008 11:22 PM



All times are GMT -7. The time now is 11:29 PM. | See also: NikonForums.com, CanonForums.com 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?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top