Canon EOS 40D Firmware Download-E - キヤノン：キヤノンホームページ

Rotate the Main Dial and the Quick Control Dial to select the "Firmware Ver.x.x.x" item at the bottom of the "Set-up 3 (Yellow)", and then press the button. The firmware update screen will appear. Turn the Quick Control Dial, select [OK], and then press

web.canon.jp