Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
03-30-2013, 10:03 PM   #1
Forum Member
dominikkolendo's Avatar

Join Date: Jan 2012
Location: portland, or
Posts: 94
k5 AE-AF lock / 11point vs 77

so i found a few threads about this, but nothign that answers my technical question.

on my k5, the center focus point and center exposure works perfectly.
but when i link AE to AF so i can have the camera expose to say, teh far left focus point, i usually get an over/underexposure if teh BG is dark/bright.

i assume this is because the AF points on the sides are large rectangles versus the small precise center AF point, and as such, the ae finds an average of the entire af area, correct?

i had hoped that with 77 segment metering the meter points would engage only in the in focus area of the shot, but perhaps this is not possible?
can someone explain how the focus points and metering poitns are connected exactly and if there are any more accurate ways to link the two other than "mean value of total AF rectangle"

03-30-2013, 10:28 PM   #2
Senior Member
Patajac's Avatar

Join Date: Jan 2012
Posts: 241
Link AE to AF works in multi segment metering by giving more weight to the selected focus point.This is up to +- 0.5 EV vs. normal multi metering. So it is not like spot metering.

  • 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!
ae, af, center, focus, k5, link, pentax help, teh
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
AE Lock SmilingDog Pentax K-30 & K-50 12 03-08-2013 03:33 AM
K5 Segment Metering with AE-L with AF Locked set ON, AE linked to AF Point set ON WightWalker Pentax K-5 14 12-05-2012 10:30 AM
AE Lock slip Troubleshooting and Beginner Help 19 12-29-2011 02:33 PM
K7 question: AF button does not lock AE when configured to do so fporter Pentax DSLR Discussion 9 07-02-2010 01:25 PM
K100D link/lock of AE-L and AF atnbirdie Pentax DSLR Discussion 15 03-15-2007 06:06 PM

All times are GMT -7. The time now is 01:55 AM. | 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]