I wrote a
script called "open-shutter" for my SD1000 for this purpose (there are some hints to port it to other cameras, but you'll have to test...). I didn't post it on CHDK wiki/forum because I'm still making some improvements. Basically it:
- sets automatically continuous mode on the SD1000 using the GUI (as I wasn't able to write the propcase)
- sets automatically the desired picture size on DIGIC III cameras
- disables black frame subtraction
- computes the appropriate long exposure so that the background is well exposed (up to the limit of the camera, often 65")
- shoots continuously for a given time (if continuous shooting is interrupted, it is detected and restarted)
- restores the modified settings
You can add one line to set focus to infinite at the beginning, or do it manually before, same for ISO and aperture (there are ubasic commands and/or
propcase values for all of these).
For the 6 photos limit, as fbonomi said it shouldn't be, this is maybe due to the speed of your card that could be too slow. Nevertheless maybe the restarting of continuous shooting when interrupted of my script will suit your needs...
Anyway, as it has not been tested on other cameras than SD1000, if you want to give it a try, you should read carefully the script, understand it, and adapt it carefully (especially for set_prop commands) before to test it.
