about 3 EV, with trade-off of somewhat less resolution and more complicated post processing involving cr2dng Auto-Dot-Tune on some DSLRs for automatic micro-focus-adjustment to calibrate lens and body (5D Mk II, 6D, 50D, 5D Mk III and 7D) Original Canon warranty Because installing Magic Lantern does not replace the stock Canon firmware or modify the ROM but rather runs alongside it, it is both easy to remove and carries little risk. Canon has not made any official statements regarding the add-on firmware, either on the subject of warranty or on the features. In response to emails Canon has stated that while their warranty doesn't cover damage caused by third party firmware it will cover unrelated issues such as malfunctioning buttons even if third party firmware has been installed. See also AXIOM (camera) References External links Canon EOS DSLR cameras Camera firmware Free software Custom firmware