Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
09-14-2008, 10:33 AM   #1
Forum Member




Join Date: Jun 2008
Location: Maribor, Slovenia
Posts: 74
K20D AF.C Accuracy

Hello there!

I've been running a few non-scientific tests on whether AF.S is more or less accurate than AF.C (or the same). I can't get really consistent results, so I ask you.

Is AF.S more, less or just as accurate as AF.C focusing mode on K20D?


Thanks in advance,


- Matej

09-14-2008, 10:49 AM   #2
Veteran Member
Gooshin's Avatar

Join Date: Sep 2007
Location: Toronto, the one in Canada.
Posts: 5,611
they are designed for different uses, why are you comparing them?
09-14-2008, 11:33 AM   #3
Forum Member




Join Date: Jun 2008
Location: Maribor, Slovenia
Posts: 74
Original Poster
QuoteOriginally posted by Gooshin Quote
they are designed for different uses, why are you comparing them?
Because I'm trying to use only AF.C + AF button for focusing, so I don't need to change focusing modes depending on the situation. (If I want "AF.S" I just let go of the AF button when I want to recompose)
09-14-2008, 11:58 AM   #4
RaduA
Guest




QuoteOriginally posted by Nanthiel Quote
Hello there!

I've been running a few non-scientific tests on whether AF.S is more or less accurate than AF.C (or the same). I can't get really consistent results, so I ask you.

Is AF.S more, less or just as accurate as AF.C focusing mode on K20D?


Thanks in advance,


- Matej
Matej,

In my experience AF-C is one of the low points of the K20D especially in dificult conditions (low light) and I prefer to use small bursts and refocus in AF-S mode.

Just MHO,
Radu

09-14-2008, 09:07 PM   #5
Loyal Site Supporter
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 9,626
QuoteOriginally posted by Nanthiel Quote
Hello there!

I've been running a few non-scientific tests on whether AF.S is more or less accurate than AF.C (or the same). I can't get really consistent results, so I ask you.

Is AF.S more, less or just as accurate as AF.C focusing mode on K20D?


Thanks in advance,


- Matej
I am not sure whether or not you are using multiple focus points or not. I find the focusing speed and accuracy are better using only the centre point - at least I know where it is trying to focus. It does mean that unless you use the back button, recompose technique you mention, your subject will always be centred.
09-14-2008, 09:46 PM   #6
Veteran Member
krypticide's Avatar

Join Date: Dec 2007
Photos: Gallery
Posts: 1,079
I've also been using AF-C+AF to focus, and so far I haven't seen any difference in focus accuracy. I think the only difference between AF-C and AF-S is that in the latter, the shutter cannot be pressed until the focus is locked. In the former, the shutter can activated without focus lock, and the focus is continuously changed as long as the scene is also changing.

I just hold AF until it locks and then let go, and hit the shutter button. For continuous focusing, I hold the AF button down and press the shutter whenever I want.
09-14-2008, 10:13 PM   #7
Loyal Site Supporter
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 9,626
QuoteOriginally posted by krypticide Quote
I've also been using AF-C+AF to focus, and so far I haven't seen any difference in focus accuracy. I think the only difference between AF-C and AF-S is that in the latter, the shutter cannot be pressed until the focus is locked. In the former, the shutter can activated without focus lock, and the focus is continuously changed as long as the scene is also changing.

I just hold AF until it locks and then let go, and hit the shutter button. For continuous focusing, I hold the AF button down and press the shutter whenever I want.
I agree that there is no difference between AF.S and AF.C, but there is a difference between using a fixed focus point and the setting that allows the camera to select the focus point. There is a discrete time interval while it attempts to figure out what to put into focus. If you tell it ahead of time, it will have less indecision. That is what I was trying to say.
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!
af.c, af.s, camera, dslr, k20d, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
AF accuracy: k-7 vs k20D augieviking Pentax DSLR Discussion 1 08-01-2009 07:18 PM
K20D viewfinder accuracy help greaserlee Troubleshooting and Beginner Help 12 07-04-2009 06:46 AM
K20D exposure metering accuracy Andrews Pentax DSLR Discussion 3 05-18-2008 07:18 AM
Improved AF Accuracy of the K20D (Under White Lights Only) RiceHigh Pentax DSLR Discussion 26 03-18-2008 11:06 AM
K20D vs K10D: WB colour accuracy creampuff Pentax DSLR Discussion 4 03-04-2008 10:53 AM



All times are GMT -7. The time now is 06:16 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