Canon announced a firmware upgrade which supports the AF assist beam feature of the new flash, Speedlite 270 EX, which is scheduled to be released in April 2009.
- 50D – Firmware Version 1.0.6 incorporates the following improvements and fixes.
- Changes the error indications that are displayed on the camera.
- Addresses the vertical banding noise phenomenon.
- Rebel XS – Firmware Version 1.1.0
- Rebel XSi – Firmware Version 1.0.5


