I followed the instructions in F5 user manual for dynamic AF function. I have had turned my focus mode seletor to "Dynamic AF", then I selected the centre point to be my main object focus point. But how come when the object move. The focus point did not change according to object movenment!! Have I done something wrong?? Pls help
#1. "RE: Dynamic AF ???" | In response to Reply # 0gewe21 Basic MemberSun 15-Apr-01 02:08 PM
Don't worry, your camera is working properly. Once you select your main focus point (center, in your case), your camera will focus on it. And when the subject moves, your camera will re-focus on the moving subject, maintaining focus and following the subject, with NO INDICATION / NO CHANGE in FOCUS POINT SELECTION. Meaning, indicator will stay on the center focus point, but the camera might be using /focusing on any other focus point. Hence , you should see than your subject, being off center now, is still sharp (in focus) while anything on the center that is not your moving subject, will become out of focus.
Sorry for the terrible explanation.
Mechanical Engineering, senior year
"Dude, you're getting a Nikkor !!!"
#2. "RE: Dynamic AF ???" | In response to Reply # 1
Thanks for your explaination!!!
But I still couldn't get the other focus points tracking with the moving subject. Ok, may be I'll give an example....
I focus on my computer mouse with the centre focus point then I hold my shutter button and move the mouse to left focus point area, but there isn't any re-focus action on the left focus point. Is there anything wrong with it???
#3. "RE: Dynamic AF ???" | In response to Reply # 2BJNicholls Charter MemberMon 16-Apr-01 10:43 AM
LAST EDITED ON Apr-16-01 AT 05:29 PM (GMT)
LAST EDITED ON Apr-16-01 AT 05:28 PM (GMT)
Do you also have the camera set for continous focus? Without that enabled as well as the multi-point AF, the focus will lock and hold on the first point it can use. You need to have continuous focusing enabled for the camera to continue to track an object while you depress the shutter button.
Your mouse isn't a very good subject to test with. Have someone volunteer to be your moving target a few feet away...
More detail as per my reply to your email:
I've found it confusing as well, but here's what works for me:
You're correct that the C setting on your AF will allow you to shoot a frame no matter what. However, C also means that in the halfway depressed shutter release AF activation position, the focus will constantly update on a moving subject instead of locking on once as it will in S mode.
Your example sounded like you were trying to get the camera to follow focus on your mouse as you moved it. You have to have the continuous AF active to do that. Well, I take that back - it will work better if you do that. Single mode will track a moving subject, but there's a delay before it will respond to movement and it will only focus again when the subject stops moving. C mode responds and tracks immediately and tries to maintain focus on a moving subject.
There is also the "nearest subject" mode which you can set up in custom settings. If you're using nearest subject, the camera will try to track the nearest object, but I'm not sure the focus point difference between your mouse and pad would be enough for the camera to work with.
I hope that makes sense. There are so many combinations of settings that I get lost and have to read up every so often. The best write up I've seen on the AF modes so far is in the F100 Magic Lantern Guide.
#4. "RE: Dynamic AF ???" | In response to Reply # 3