I use the back AF button and leave the shutter button for tripping the shutter.
The camera stays in AF-C all of the time. When the camera is focused on what I
want to focus on, I take my thumb off the AF button and it stops there.
It did take a little while learning to do it that way.
According to Google, there are two modes - AF-C (continuous). AS long as you're
holding the AF button[1] the camera will continuously focus. Good for a moving
subject.
AF-S (Single) focuses once. To change the focus, you have to release your AF
button and press it again.
Some cameras have a mode called AF-A where the CAMERA switches between AF-C &
AF-S based on whether it thinks your subject is stationary or moving.
I've never seen AF-A like that on a Pentax camera ... but I haven't looked for
it either.
[1]AF button means whatever you have the camera set up to cause it to focus.
On 2/24/2021 22:26:03, Larry Colen wrote:
Just like Arthur Dent and Thursdays, I’ve never really gotten the hang of
autofocus. I think that I’ve pretty much bludgeoned autoexposure into
something resembling submission, but getting my camera to autofocus
correctly, on what I want it to is at best a stochastic exercise.
On my K100, K20 and K-x I just gave up and installed Katzeye screens and
mostly did manual focus, and because of the way the katzeye worked, that
meant I also ended up doing manual exposure as well.
Historically, overall, I seem to have had the least bad luck, with it in AF-S
mode, selecting a single point, and using the AF button to lock out the
autofocus once I thought I had it properly focused, Even so, I get a lot of
photos perfectly focused on the microphone in front of a singer, the wrong
portion of a bird, the wall behind dancers, or on absolutely nothing at all
in the frame.
Lately, I’ve been experimenting with AF-C and AF-A (I’m not sure I understand
what AF-A is), and things don’t usually seem to be much worse. I’ll also
occasionally play with the sel-9 autofocus mode.
I realize that different types of photography take different techniques.
With static scenes I can fiddle and frotz until I get something that seems to
work, but when photographing birds, either in trees or on the wing, I really
need some techniques and settings that at least improve my odds of getting a
shot in focus.
What settings do you use in which situations?
-- Larry Colen l...@red4est.com
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