Canon has released firmware update for Canon EOS Rebel T2i / 550D  digital SLR.

Firmware Version 1.0.8 incorporates the following fixes.

  1. Fixes a phenomenon in which the set aperture moves unexpectedly when shooting movies in manual exposure mode using some Canon lenses (such as macro lenses).

The Version 1.0.8 firmware is for cameras with firmware up to Version 1.0.7. If the camera’s firmware is already Version 1.0.8, it is not necessary to update the firmware. The firmware is available for download from Canon’s website.

Download latest firmware v1.0.8 here