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The file name on the EOS 5D Mark III has four alphanumeric characters followed by a four-digit image number and extension. The first four characters are set upon factory shipment and unique to the camera.
However, you can change them. With [USER SETTING 1], you can change and register the four characters as desired. With [USER SETTING 2], if you register three characters, the fourth character from the left will be appended automatically to indicate the image size. Please follow these steps to access these settings:
Enter any alphanumeric characters.
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