1. AF, S and C AF are autofocus modes, and S and C are two working modes in autofocus mode.

Focus on the words 1 and s, and only focus once every half shutter is pressed;

2, C continuous focusing, shutter half-time focusing action is continuous, which is more suitable for shooting dynamic targets.

Second, MF means manual focusing, which requires the user to turn the focusing ring to complete the focusing operation (the shutter will not focus on time).