Firmware Update: Canon EOS 20D 2.0.3

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Canon has also released a new firmware for the EOS 20D. It solves a problem in combination with Speedlite 430EX and improves the reliability in communication with CF memory cards. The firmware is only suitable for cameras with firmware version 2.0.2. Before flashing, the lens must be removed from the camera, after which the camera must be turned off and the battery removed from the camera for at least two seconds before it recognizes the new firmware. Extensive information about the firmware can be found here this page are being found. The changelog of this release looks like this:

This firmware incorporates the following additions and improvements:

  • Fixes a problem in color temperature information transmission that occurred when using Speedlite 430EX.
  • Improves reliability in communication when using CF cards.

[break]The following downloads are available:
Canon EOS 20D firmware 2.0.3 update for Windows
Canon EOS 20D firmware 2.0.3 update for Mac OS X
Update instructions (pdf document)[break]

Version number 2.0.3
Operating systems Windows 9x, Windows NT, Windows 2000, Windows XP, macOS
Website Canon
File size


License type Freeware
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