Canon has released a firmware update for the EOS-5D Mark II.

Firmware Version 2.0.9 incorporates the following improvements and fixes:

  1. Improves writing/reading speeds when using UMDA 7-compatible CF cards.
  2. Fixes a phenomenon where the IS function will not work when custom function C.Fn III-2 is set to [5: IS start] and the lens attached does not have an AF stop button.  This is because custom function C.Fn III-2 allows users to assign IS start to the AF stop button on the lens.
  3. Corrects misspellings in the menu screens displayed in Arabic, Portugese, Spanish and Thai languages.

The new firmware Version 2.09 can be downloaded by clicking here and then firmware.

Firmware version 2.0.9 is for cameras with firmware up to version 1.0.8. If the camera's firmware is already version 2.0.9, it is not necessary to update the firmware.

June 2011Technical documentation