Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
09-30-2010, 04:50 PM   #76
twitch's Avatar

Join Date: Nov 2009
Posts: 4,571
I think an important thing to understand is that the auto-ISO algorithims in Av mode is geared to protect against camera shake, not subject motion.

I shoot most of the time in Av mode, and the problem I've started having now I've got my DA21, is that in Av mode the shutter to allowed to drop too low to cope with subject motion. Previously I was shooting mainly normal to long focal lengths and the shutter speed was high enough to deal with subject movement.

One reason I'd like to upgrade to the K-5 is for the TAv mode so I can set the shutter fast enough even on wide lenses to cope with subject motion, whilst having control over the apperture.

09-30-2010, 05:27 PM   #77

Join Date: Apr 2010
Location: Wangaratta, Victoria
Photos: Gallery
Posts: 3,499
I've never tried it. Always have ISO on lowest setting and move it up when necessary.
If it is as predictable as Elvinas says, I might give it a go and check it out. It would save some adjustments at inconvenient times.

  • 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, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Auto ISO Relic Pentax DSLR Discussion 4 04-08-2009 06:21 PM
Flash and Auto ISO deathspared Troubleshooting and Beginner Help 5 02-17-2009 08:57 PM
Tweakable Auto ISO! pareto Pentax DSLR Discussion 12 01-31-2008 09:03 AM
K100D and auto iso. Deni Pentax DSLR Discussion 18 12-22-2007 06:21 PM
Auto ISO dwssas Pentax DSLR Discussion 4 11-15-2007 07:12 AM

All times are GMT -7. The time now is 07:41 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]