What's the difference between M and P files of Canon DC?

M file is also called manual exposure, which means that the exposure parameters (iso, aperture, shutter) of the fuselage should be set by the user. In other words, users should use the exposure value that they think is correct according to their own judgment on the ambient light source. The advantage is high flexibility, but the disadvantage is that users who are not familiar with photography knowledge will greatly reduce the success rate of shooting and easily produce waste films. To make good use of M files, we must systematically learn the basic knowledge of photography.

P file is also called program automatic exposure, and the fuselage will automatically adjust the exposure parameters according to different light environments. P file has more space for users to set themselves than auto file, such as flash setting and white balance setting.