| Author | Thread |
|
|
12/15/2005 05:51:49 PM · #1 |
| What's the difference between C-AF and S-AF? |
|
|
|
12/15/2005 05:55:51 PM · #2 |
CAF means Constant Autofocus and must be used while focusing on moving objects. This mode will constantly update the focus distance.
SAF means Single autofocus and must be used to "lock focus on" objects. If the distance to the object changes after locking on focus the object will be out of focus.
google rawks
James |
|
|
|
12/15/2005 06:07:52 PM · #3 |
| Would it be better then to just leave it on CAF? |
|
|
|
12/15/2005 06:09:42 PM · #4 |
Originally posted by pianomom:
Would it be better then to just leave it on CAF? |
Not really. Wind can play havoc with it or even slight camera movement.
CAF can get very annoying though very useful in the right situation. |
|
|
|
12/15/2005 06:13:38 PM · #5 |
| So the CAF would be good for sports pictures? |
|
|
|
12/15/2005 06:18:47 PM · #6 |
Originally posted by pianomom:
Would it be better then to just leave it on CAF? |
not really, if you need to compose a shot with a certain object as the focal point, but then move the camera for a slightly different angle, the CAF will re-adjust the focus point for you. Unless there is a way to lock focus with the CAF option turned on.
James
|
|
|
|
12/15/2005 06:20:32 PM · #7 |
Originally posted by pianomom:
So the CAF would be good for sports pictures? |
yes,
I dont use this mode (AI focus and or AI servo on the 20D) I tried it but dont like it, probablly cause my lenses focus slow
James |
|
|
|
12/15/2005 06:28:20 PM · #8 |
Originally posted by jab119:
Originally posted by pianomom:
Would it be better then to just leave it on CAF? |
not really, if you need to compose a shot with a certain object as the focal point, but then move the camera for a slightly different angle, the CAF will re-adjust the focus point for you. Unless there is a way to lock focus with the CAF option turned on.
James |
Oh, Yeah, I forgot about that! Duh! :) |
|
|
|
12/15/2005 10:03:49 PM · #9 |
Originally posted by cpanaioti:
CAF can get very annoying though very useful in the right situation. |
it can also eat up your battery, which should be saved for opening the shutter to a lovely photo op, not focusing wildly as your camera swings around your neck while walking to the next lovely photo op.
|
|
|
|
12/15/2005 10:07:58 PM · #10 |
| I have 5 dogs and a large backyard. When I go out to take pictures of them I set my camera to C-AF. That way I can move the camera with them as they run around the yard like maniacs and shoot pictures when they are in good spots. If the focus locked on them I'm need to release the shutter button and focus again - missing many great shots that way. |
|
|
|
12/15/2005 10:29:45 PM · #11 |
Originally posted by megatherian:
I have 5 dogs and a large backyard. When I go out to take pictures of them I set my camera to C-AF. That way I can move the camera with them as they run around the yard like maniacs and shoot pictures when they are in good spots. If the focus locked on them I'm need to release the shutter button and focus again - missing many great shots that way. |
YES depending on situations, C-AF can get pretty useful. I dont switch it on by default due to battery drain concerns though. |
|
|
|
12/15/2005 11:30:34 PM · #12 |
Originally posted by ragamuffingirl:
What's the difference between C-AF and S-AF? |
Oh yeah definitely the stupidest question EVER. Right up there with "What's the difference between nuclear fission and fusion?" and "What is the name of that guy who played crewmember #312 in episode 86 of Star Trek (original series)?"
;-) |
|
|
|
12/16/2005 01:41:48 AM · #13 |
Originally posted by pianomom:
So the CAF would be good for sports pictures? |
Not always, I had Continuous AF on my Canon Powershot Pro1. Besides tearing up batteries (last about half what you would get w/o CAF on) it was very easy to get off the subject and get a sharp background instead.
It is not the same (at least on the Canons) as Syncro AF that tracks the subject, CAF keeps the center point (or which ever focal point you have selected) in focus... meaning if you are focused on a player and he/she moves away from your focal point then it immediately focuses on something in the background. You still have to be pretty accurate at following the subject...
If you have a Syncro AF mode that is by far a better choice for sports.
Message edited by author 2005-12-16 01:42:28. |
|
|
|
12/16/2005 02:29:26 AM · #14 |
What Pollard said: if you don't keep your AF point right over your subject, you're gonna lose focus all the time in C-AF. It's maddening. I had that problem shooting flying birds with my Coolpix 5700. The 20D has a focus setting that will track a specific subject as it moves, and that works really well.
Robt. |
|
|
|
12/16/2005 02:34:54 AM · #15 |
Interesting that new *ist DS firmware has added this as a feature in the menu.
|
|
Home -
Challenges -
Community -
League -
Photos -
Cameras -
Lenses -
Learn -
Help -
Terms of Use -
Privacy -
Top ^
DPChallenge, and website content and design, Copyright © 2001-2025 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 09/10/2025 07:30:57 PM EDT.
