However, with CHDK installed, it becomes a very capable little camera — that you can even program. Since you camera supports RAW images, you can use it to have a little more latitude in dealing with noise. Just take a picture as you normally would. Be sure to have your camera set to manual mode. Skip to content TutorialsOwen June 12, 2009 One of the best reasons to use a Canon PowerShot camera for time lapse videos is the CHDK (Canon Hack Development Kit) firmware addon. Manual Focus timing updated. 01-Sep-2010 Software/Firmware for CAMremote-2/2A: Apply Time parameters for pan/tilt servos are extended to milliseconds.
However, what’s really missing are any way to hold the camera and any way to control the aperture (aperture control commands actually just click an ND filter in/out of place). For under $100 new, the camera is a very good deal. Then, plug in your camera’s SD card, and copy ult_intrvl.bas to /CHDK/SCRIPTS/. To use the intervalometer, navigate to the main CHDK menu, find “Scripting parameters”, and click “Load script from file”. Find ult_intrvl.bas, and press set. That would make one think IQ isn’t very good, but actually IQ of «A» cameras is less compromised than other aspects; lack of manual controls (which CHDK pretty much works around) and things like pivoting displays, and poor battery life, are the the primary sacrifices. The next step erases all data on your card. Here is an example using the subject distance: Press Mode to get into Alt mode then press Menu Choose Extra Photo Operations followed by Bracketing in Continuous Mode Set Subj. Additionally, using neutral density filters, you can even take long exposures in the day time!
Writing your own scripts CHDK uses a very simple BASIC-like language called UBASIC. It has all of the features that one would expect from any language, but there are many camera specific features. Mount the camera on a tripod, using Manual shooting mode select the widest (lowest number) aperture (see page 152 of your manual). Normally you would select the ISO for the number of stars you want to be visible. The absolute mapping between integer values and shutter speeds varies between cameras, but tables are available here.