Amy
MamaGrumpy
- Joined
- Aug 18, 1999
- Messages
- 4,367
When you half-press the shutter, you're actually locking *both* focus and exposure ... so, if you meter off the sky and then want to recompose on something near-by you can end up with a very out-of-focus pic.
Pressing the ISO button allows you to completely release the shutter button, recompose on anything you want, and then take the picture (re-focusing as necessary) with the same exposure settings. You can even change the settings (shutter speed or aperture; it's called Program Shift) with the omni-button, without changing the overall exposure.
Here's a link to the on-line manual for it.
Thanks, Stitch! I don't recall seeing that tidbit of info in the S3 manual that came with the camera or the Short Courses book, but it's been a while since I read thru them. Now that I know the camera better, I guess I'd better re-read the Short Courses book and see what else I missed!
It's funny, but I can look at other people's photos and see what they did wrong, but when I'm taking a picture, I tend to forget all the little details. I was taking pics of my DS and his homecoming date this weekend, totally forgetting about focus - the square in the center of the viewfinder was focusing on the bushes they were standing in front of rather than their faces. DUH!


Ah well, one of these days all this will be second nature to me and I won't HAVE to think about it!