Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-25-2008, 02:38 PM   #1
New Member




Join Date: Jun 2008
Location: Finland
Posts: 5
K10D focus problem... (again)

I've long been wondering why a huge amount of my pictures are off-focus. I thought I'm doing something wrong when focusing (focus spot off-target, AF finding something that I've not noticed etc). After I found this forum couple of days ago I realized that maybe my K10D is back-focusing.

I took couple of test pictures. These are center crops - the original ones includes the whole paper. First with
Sigma 100-300 mm f/4 which I just bought. This one is - I think - just perfect.

The next one is taken with Pentax DA* 50-135 mm f/2.8 which I've mainly been using. I think the focus is 20-30 mm too far. I took several pictures with this lens and this is the best one. How this will affect focusing when the distance is e.g. 20 meters or something?

Focus was OK also with Pentax DA 16-45 mm f/4.

Is there any cure for this? For just this Pentax DA* 50-135 mm lens so that nothing would change with other lenses?


Last edited by Nuutti; 06-25-2008 at 02:44 PM.
06-25-2008, 03:33 PM   #2
Veteran Member




Join Date: May 2007
Location: York Region Canada
Posts: 642
Well for one thing, your not square to the target, and it looks like your shooting at a pretty high angle.

The sigma looks off atad as well ,but not much.


Test it in field conditions as well.

Some members of the PDML have noticed some focus issues with the DA * lenses on earlier model K10D;s.

I suggest sending the camera and lenses in to Pentax to look at.
That was how i solved my problem. Sending in the lenses so they could set up the camera.

Dave
06-25-2008, 03:38 PM   #3
Veteran Member




Join Date: Jan 2008
Location: Ste-Anne des Plaines, Qc., Canada
Posts: 2,014
Before sending anything to Pentax, the test should be re-done with the camera level, square with the target and thee target at a 45 deg. angle. Right now, it just shows sloppiness where EVERYTHING should be done to control the shoot and avoid variables that could influence the results.
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!
camera, couple, da*, dslr, f/4, focus, k10d, lens, mm, pentax, photography, pictures
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
K10D and focus problem cherno Pentax DSLR Discussion 10 10-10-2010 09:09 PM
Manual focus problem with K10D? yyyzzz Pentax SLR Lens Discussion 8 12-01-2009 05:50 AM
K10D auto focus problem? Tom C Pentax DSLR Discussion 18 05-08-2008 01:13 AM
K10D Back-focus problem... TomInJax Pentax DSLR Discussion 35 04-24-2008 11:27 AM
K10D focus problem Lumens Pentax DSLR Discussion 2 02-13-2008 12:01 AM



All times are GMT -7. The time now is 01:49 AM. | 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