Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
07-29-2011, 08:35 AM   #1
New Member




Join Date: Aug 2009
Location: North Yorkshire
Posts: 4
AF Fine Adjustment

There is no clear information in the K-5 user's manual as to which way to move the adjustment scale to correct front or back focus. So, if a lens is front focussing with the AF scale at 'Unset' or '0' should you dial in a '+' or '-' setting to correct it?

Nikon have a effective method, showing a camera icon at one of the scale and a mountain icon at the other to suggest movement towards or away. Michael Reichmann in Luminous Landscape says put in a minus adjustment for a front focussing lens (which is my instinct), whereas Amateur Photographer magazine, in a recent article on focus adjustment, says do the opposite, ie input a '+' setting for a front focussing lens.

You can see where the confusion arises - anyone with a definitive answer, please?

PS. Spoke to Pentax UK customer service and they didn't know either! Said to try bracketing and see what happens. Not confidence inspiring


Last edited by Bramela; 07-29-2011 at 12:20 PM. Reason: Reference no longer applicable
07-29-2011, 09:17 AM   #2
Loyal Site Supporter
imtheguy's Avatar

Join Date: Mar 2009
Location: Virginia Beach
Photos: Gallery | Albums
Posts: 2,950
This is the second post with this question in the last week. I think I could test it with one or two tries and have the answer much faster than typing in the question. But for those that don't have a K-5 to test with, negative values push the center of the DOF back, further from the camera. So for front-focusing issues, start with a (-5) value and retest.

As far as the person at Pentax-UK not knowing the answer....don't sweat the small stuff.
07-30-2011, 08:05 AM   #3
New Member




Join Date: Aug 2009
Location: North Yorkshire
Posts: 4
Original Poster
Thanks, Lee. I posted the question on the beginners' forum without reply after over 360 views so posted it again here.

Thanks for the info - it is as I thought, that a minus input would push the focal plane away from the sensor plane. The readers of Amateur Photographer will be confused!
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, focus, front, icon, lens, pentax help, scale
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
K-5 AF fine adjustment - does it work for non Pentax lenses? Christine Tham Pentax K-5 30 12-28-2011 01:35 PM
Kr AF Fine adjustment Surfwatch Pentax K-r 3 07-29-2011 06:53 AM
Just did AF Fine Adjustment - all my lenses are off?! HenrikDK Pentax K-5 30 07-27-2011 06:55 PM
K-5 auto focus fine adjustment tools? Sten Pentax DSLR Discussion 8 03-20-2011 04:28 PM
Lens fine adjustment suggestion to Pentax? ve2vfd Pentax K-5 2 12-09-2010 10:00 PM



All times are GMT -7. The time now is 11:02 AM. | See also: NikonForums.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