It is the successor of the
Canon EOS 350D, and upgrades to a 10.1
megapixel CMOS sensor, a larger continuous shooting buffer, an integrated
image sensor vibrating cleaning system (first used in a Canon EOS DSLR), a more precise nine-point
autofocus system from the
EOS 30D, improved grip, and a bigger
LCD with 230,000 pixels and a larger viewing angle which replaces the top status screen. The 400D uses the
DIGIC II image processor, as is used in the 350D. The 400D file numbering system holds 9,999 pictures, as opposed to 100 photos in one folder with the 350D. Support for the
Media Transfer Protocol (MTP) USB protocol is available since version 1.1.0. The latest firmware available is version 1.1.1. It was succeeded by the
Canon EOS 450D (Rebel XSi in North America) which was announced at the
PMA show in January 2008 with sales commencing in April 2008. == Custom firmware ==