Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-13-2013, 01:36 PM   #1
Veteran Member




Join Date: Apr 2011
Location: Texas
Photos: Gallery | Albums
Posts: 528
Lens Micro Focus Adjustment on K-X?

Is there a way to micro adjust the focus on each lens I use on the K-X? (for both manual and autofocus lenses).

12-13-2013, 01:50 PM   #2
Site Supporter
Site Supporter
jatrax's Avatar

Join Date: May 2010
Location: Washington Cascades
Photos: Gallery | Albums
Posts: 12,991
No. k-x has only a single global adjustment.
12-13-2013, 02:12 PM   #3
Veteran Member




Join Date: Apr 2011
Location: Texas
Photos: Gallery | Albums
Posts: 528
Original Poster
So I guess it would be prudent to memorize the settings for each lens and manually change that global setting each swap? Is that why some of my lenses seem soft? I bet it is.
12-13-2013, 02:28 PM   #4
Site Supporter
Site Supporter
jatrax's Avatar

Join Date: May 2010
Location: Washington Cascades
Photos: Gallery | Albums
Posts: 12,991
Possibly, if I remember right you do a lot of work with very wide apertures? That's where the small differences will show. On lenses @ f/5.6 or so it is very hard to see that any AF fine tuning will help. The wider DOF masks any small error. And there are many other possible causes of 'softness' such as subject motion, camera motion, lens just being soft wide open.

I would only consider messing with AF fine tuning if you can repeatedly duplicate the softness in a controlled test. On a tripod, well lit focusing target using time delay or remote release. It is very easy to make things worse as in most cases the margin of error in the test exceeds the original AF error.

Also, on manual lenses the 'green hex' and 'in focus beep' are not really reliable beyond f/5.6 or maybe f/4. After that the DOF is smaller than the range of in focus indication ( if that makes sense).

If you really feel you need to tune each lens then you might consider moving up to a camera that allows that such as k-5 or k-3. I think the k-50 does as well but I'm not 100% sure on that.

12-23-2013, 09:07 PM   #5
Senior Member




Join Date: Aug 2009
Location: Houston, TX
Photos: Gallery
Posts: 140
QuoteOriginally posted by jatrax Quote
I think the k-50 does as well but I'm not 100% sure on that.
It does.
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, dslr, focus, focus adjustment, lens, lens micro focus, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
auto focus adjustment on k-5 II devouges Troubleshooting and Beginner Help 2 06-27-2013 12:57 PM
Pentax-F 1.7x AF Adapter focus adjustment on K-5 oeriies Pentax SLR Lens Discussion 5 03-24-2013 05:13 PM
Focus micro adjustment? MegaPower Pentax K-30 & K-50 3 05-22-2012 02:35 PM
Quantitative Method for Micro Focus Adjustment for DSLRs vincenzomiceli Pentax DSLR Discussion 11 01-13-2012 04:08 PM
k-x focus adjustment fafo13 Pentax DSLR Discussion 2 04-21-2011 06:48 AM



All times are GMT -7. The time now is 11:58 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