Firmware Updates

Canon EOS-1D Mark IV Firmware Version 1.1.0

Canon EOS-1D Mark IV

Canon EOS-1D Mark IV

Canon has published a firmware upgrade for the EOS-1D Mark IV that:

  1. Improves writing/reading speeds when using UDMA 7-compatible CF cards.
  2. Fixes a phenomenon where the ability to shoot movies may be stopped under the following conditions:
    • When using high-capacity (32 GB or greater) CF cards with little available space remaining and the user attempts to start shooting movies; or
    • When the camera’s battery is removed and reinserted into the camera and the user immediately attempts to start shooting movies.
  3. Corrects misspellings in the menu screens displayed in Arabic and Portuguese languages (applies to models outside of the the Japanese market only).

You can download the firmware at: Canon. [Click on Drivers & Software – Firmware – select your OS]