Canon EOS 50D Firmware Update 1.0.3

This firmware update (Version 1.0.3) incorporates the following fixes.

1. Corrects a phenomenon in which an image becomes overexposed when C.Fn.II-3 Highlight tone priority is set to "1" together with other camera settings. (This correction has already been incorporated in the Version 1.0.2 and later firmware.
2. Corrects a rare phenomenon in which "busy" blinks on the camera's display panel and the shutter cannot be released due to the timing of battery installation.
3. Corrects a rare phenomenon in which "Err 99" appears on the camera's display panel and LCD monitor and the shutter cannot be released due to the timing of pressing the shutter button.

Firmware Version 1.0.3 is for cameras with firmware up to Version 1.0.2. If the camera's firmware is already Version 1.0.3, it is not necessary to update the firmware.

Before downloading the firmware update, please be sure to read the entire contents of this page.

A power failure during the firmware writing operation may disable the camera.

• Use a fully charged Battery pack or dedicated AC adapter Kit (Optional) ACK-E2 for the firmware update.
• Do not shut off the power during the firmware writing operation.
• Do not open the CF card slot cover during the firmware writing operation.

Do not press any camera buttons during the firmware writing operation.