Firmware version 1.0.8 fixes a phenomenon in which captured images may become overexposed when using the camera's built-in flash or an external Speedlite in combination with the following lenses:
- EF 300mm f4L IS USM
- EF 28-135mm f3.5-5.6 IS USM
- EF 75-300mm f4-5.6 IS USM
- EF 100-400 f4.5-5.6L IS USM
The firmware upgrade can be installed by the user. Full instructions and downloads are available at the
>>Canon Download Centre
- EF 300mm f4L IS USM
- EF 28-135mm f3.5-5.6 IS USM
- EF 75-300mm f4-5.6 IS USM
- EF 100-400 f4.5-5.6L IS USM
The firmware upgrade can be installed by the user. Full instructions and downloads are available at the
>>Canon Download Centre