How to use Canon 5dsm file?

Set the mode dial to M, set ISO, rotate the dial to set the required shutter speed and rotate the dial to set the required aperture value. If it cannot be set, turn the lock switch to the left, press the shutter button halfway to automatically focus on the subject (or manually), pay attention to check whether the exposure indicated by the exposure scale is correct, and press the shutter button completely to finish shooting.