So I've read lots about how the built in bracketing works with Allthebest (and in general), but I can't quite get things working right on my SD630. I'd really like to have it take 3 pictures in "+/-" mode. I'd like them to be ISO bracketed (duh), something like 400/200/800 (that general idea). I'd like the flash to automatically fire if necessary on any given exposure, but I don't want to have to change anything per-exposure (hence the "auto" =] ).
I guess what I really need is someone to explain exactly what settings I need to configure to make this happen. Let's pretend I start with a bone-stock Allthebest config on SD630 (digi II platform, of course). I'm not sure if my dreams are reasonable with respect to getting the flash into auto mode, so even just getting the ISO part to work would be great.
I've tried things like setting the "ISO bracketing value" to, say, "4", and then "Value Factor" to about "100", but I'm getting unexpected behavior, for example the first two shots have differing ISOs, but the third is the same as the second. I've actually tried lots of permutations of the aforementioned values, everything from 1 to 10 on the former, and 1, 10, 100 on the second one.
Here are a few useful pages I've found:hdr images?CHDK firmware usage/AllBest - CHDK WikiUBASIC/Scripts/CanonA640: ISO Bracketing - CHDK Wiki
*KAP Discussion Page - Easy bracketing with CHDK and any intervalometer script or shutter press
*I tried this and it doesn't work. It seems to be mostly a "macro" of simulated button commands, as opposed to manual configuration changes for camera settings. Since the buttons on the A640 are different from the SD630, it doesn't work.