What do M, S and C in the lower right of the camera mean?

M is manual focusing and S is single autofocus? C is object tracking autofocus.

1, manual focusing means turning the lens focus ring or stepping by pressing the body direction key to achieve clear focusing. Manual focusing in the digital camera era is generally used when autofocus fails, which is a powerful supplement to autofocus and is still an indispensable function in the digital age.

2. Auto-focusing refers to the way of using the principle of object light reflection to receive the reflected light through the sensor CCD on the camera and drive the electric focusing device to focus through computer processing. It can be divided into two categories: one is active and the other is passive.

3. Object tracking autofocus (AF servo) is an autofocus system for moving objects in electronic cameras. Using this focusing mode, the photographer only needs to press the shutter button half-time, and the camera will follow the change of the target distance and focus the target countless times. Automatic tracking and focusing system is most commonly used in sports photography, such as track and field, horse racing and racing.

Extended data:

Auto focus has the following three characteristics.

1, which automatically judges the subject photographed by the photographer in some way;

2. Measure the distance between the object and the photosensitive element of the camera in some way;

3. Drive the motor to push the focusing device of the lens to the corresponding distance scale.

Baidu Encyclopedia-Manual Focus

Baidu encyclopedia-object tracking autofocus

Baidu encyclopedia-autofocus