Canon EOS 5D Mark III EOS 5D Mark III Instruction Manual - Page 293

3 Manual Sensor CleaningN Dust that could not be removed by the automatic sensor cleaning can be removed manually with a blower, etc. Before cleaning the sensor, detach the lens from the camera. The surface of the image sensor is extremely delicate. If the sensor needs to be cleaned directly, having it done by a Canon Service Center is recommended. 1 Select [Sensor cleaning]. Under the [53] tab, select [Sensor cleaning], then press . 2 Select [Clean manually]. Select [Clean manually], then press . 3 Select [OK]. Select [OK], then press . X In a moment, the reflex mirror will lockup and the shutter will open. "CLn" will blink on the LCD panel. 4 Clean the sensor. 5 End the cleaning. Set the power switch to . If you use a battery, make sure it is fully charged. If the battery grip with sizeAA/LR6 batteries is attached, manual sensor cleaning will not be possible. As power source, using the AC Adapter Kit ACK-E6 (sold separately) is recommended. 293