Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
12-31-2010, 11:27 PM   #1
New Member

Join Date: Dec 2010
Posts: 1
K-r autofocus tests

I have 2 K-r units in my possession. The first showed front focus problems and the second is a unit in exchanged for the first one. Serial numbers are 40 units apart (second with a lower number than the first). I also have a K100D Super. All test shots are taken with an FA50 at f/1.4, aperture priority mode, tripod, no SR, tungsten light overhead, tungsten WB, 2 second timer.

Here is the focus test image from the second unit with 0 focus adjustment:

Name:  IMGP1140 K-R 0.jpg
Views: 1546
Size:  112.6 KB

Here is the the same unit with -10 focus adjustment:

Name:  IMGP1141 K-R -10.jpg
Views: 1259
Size:  112.8 KB

Here is the K100D Super:

Name:  IMGP1046 K100D Super.jpg
Views: 1348
Size:  86.9 KB

Am I correct in the following conclusions - (1) the second unit has a front focus problem; (2) the -10 adjustment is close but not sufficient; and (3) K100D Super also needs calibration?

Finally, how will Canikons do under similar conditions (specifically interested in D3100 / D7000 / T2i / 60D)?


01-02-2011, 11:00 AM   #2
Veteran Member
krebsy75's Avatar

Join Date: Jun 2010
Location: Chester County, Pa.
Posts: 804
Calibration is only required if there are focus issues in all lighting conditions. You will need to test this as well. If you find that your camera just has focus issues in tungsten lighting, there is no calibration option that I am aware of. It simply represents a limitation of the camera's AF system.

Last edited by krebsy75; 01-02-2011 at 03:21 PM.

  • 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, camera, focus, front, k-r, k100d, kr, pentax k-r, test, tungsten, unit, units
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
K5 AF Tests jpzk Pentax K-5 140 05-11-2011 02:10 PM
Help! Autofocus switch stuck on AF.S and will not autofocus! pauldiebel Pentax DSLR Discussion 3 09-19-2009 08:59 PM
For Sale - Sold: FS: Autofocus film cameras and autofocus lenses Not Registered Sold Items 15 03-17-2008 07:08 AM
In-Body autofocus vs In-Lens autofocus Gooshin Pentax DSLR Discussion 7 02-05-2008 11:10 AM
First P-D FA 100mm tests... Duh_Vinci Post Your Photos! 5 03-19-2007 11:34 AM

All times are GMT -7. The time now is 07:56 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]