There is one persistent change to the camera, which is reversible, which enables the camera to boot the firmware from the memory card. Like CHDK, the Magic Lantern firmware enhancement resides on the SDHC card. * Debug functions (display CMOS temperature, screenshot, logging) * Display time remaining during video recording * Manual audio gain, selectable input source, disable AGC and * Wireless trigger with the LCD face sensor & your own hand * Trap Focus: camera takes a picture when something comes in focus * Zebra stripes for overexposed / underexposed areas * Bit rate control (QScale parameter) for the H.264 encoder

* GUI menus: press the ERASE button to display them Here's a list of the available features.more are in the process of being added regularly: I successfully loaded the firmware today and can confirm that the intervalometer works properly. Versions of this firmware are also available for the Canon 5D Mark II and for the Canon 60D. Many of the features enhance the HD video capabilities of the camera, but one feature of particular interest for KAP is the embedded intervalometer.

A firmware enhancement called Magic Lantern has recently been released which gives the Canon T2i/550D enhanced CHDK-like functions.

Magic lantern canon 550d install