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400plus is a free firmware enhancement software which offers additional functionality and capabilities to your Canon 400D/XTi camera, in both a non-destructive, and non-permanent way. It works by loading into your camera's memory automatically upon boot-up to enhance the native camera firmware; but it is not a permanent firmware upgrade, and can easily be removed.

It is designed specifically for the Canon 400D/XTi and will not work with other camera models.

For Users

Some warning advice that everybody should read before doing anything else:

• A Word of Warning.

Instructions on how to prepare your camera and install 400plus in your CF cards:

• Firmware Hack Installation

A guide to understand how to configure and use 400plus:

• User's Guide

For Developers

Some resources for people interested in development:

• General info for developers
• Translators' Guide

Extra Info

For those interested to know what has changed in each version:

• Chronological list of changes

See who is responsible for this great software:

• We wish to say thanks to these guys.