Canon CHDK alternate firmware
The CHDK is a free powerful tool that upgrades the firmware of many Canon Powershots to add some great features. We now convert almost all of the cameras supported by the CHDK, making it a very nice combination for IR shooting.
Important features that are relevant for IR photography:
RAW file support
Full manual exposure controls
Bracketting controls
Intervalometer for remote aerial photography
Read more at http://chdk.wikia.com/wiki/CHDK
Some of the CHDK supported cameras that we convert:
A2000, A450, A460, A470, A480, A490, A495, A530, A540, A550, A560, A570, A590, A610, A620, A630, A640, A650, A700, A710, A720, Elph 300, S3, S90, S95, G7, G9, G11, G10, G12, SD400, SD450, SD500, SD550, SD600, SD630, SD700, SD750, SD770, SD780, SD790, SD800, SD850, SD870, SD880, SD890, SD900, SD940, SD950, SD980, SD990, SD1000, SD1100, SX100, SX110, SX230IS