Canon has released firmware updates for its 50D, 450D and 1000D digital SLRs. Firmware versions 1.0.6, 1.1.0 and 1.0.5 for EOS 50D, Rebel XSi (450D) and Rebel XS (1000D) respectively, support the AF assist beam feature of Canon's latest Speedlight 270 EX flashgun. Additionally, the 50D update rectifies other issues including vertical banding noise.

EOS 50D users are also advised to update the Digital Photo Professional, Picture Style Editor, ZoomBrowser EX and ImageBrowser software to the latest versions.

Click here for more information and to download v1.0.6 for Canon EOS 50D

Click here for more information and to download v1.1.0 for Canon EOS 450D

Click here for more information and to download v1.0.5 for Canon EOS 1000D