Canon EOS 400D / Digital Rebel XTi

The EOS 400D is the first camera to incorporate the EOS Integrated Cleaning System. Based on significant research into the causes of dust in D-SLR cameras, the system combats dust in three important ways: Reduce, Repel and Remove.

1. Reduce – Internal camera mechanisms are designed to minimize dust generation. The body cap is redesigned to prevent dust generation through wear on the cap itself.
2. Repel – Anti-static technologies are applied to the low-pass filter covering the front of the sensor so as not to attract dust.
3. Remove – A Self-Cleaning Sensor Unit uses hi-frequency vibrations to shake dust from the low pass filter for a period of approximately one second after each start up. For instant shooting after power up, this feature is disabled immediately the shutter release is depressed.

Canon has also developed an internal Dust Delete Data system, which can map the position of any visible dust on the sensor. This can then be deleted automatically after the shoot with the latest Digital Photo Professional software.

The EOS advantage

The EOS 400D inherits a number of advanced features proven in higher-end EOS models, such as the EOS 30D and 5D. These include its 9-point AF system, Picture Style (see Appendix: Technologies Explained), 9,999 image capacity folders and expanded Pict bridge functionality.

The EOS 400D also incorporates the same DIGIC II processor found across the EOS range right through to EOS‑1 professional models (see Appendix ‘Technologies Explained’). As well as providing superior image quality through advanced rendering algorithms and almost instant 0.2 second start up time, DIGIC II’s accelerated processing prioritizes the photographer’s ability to keep shooting by clearing the buffer quickly between frame bursts.