Definition and principle of exposure compensation and what principles are followed in portrait shooting?

Exposure compensation is an exposure control method, which is generally about 2-3 ev. If the ambient light source is dark, you can increase the exposure value (such as+1EV, +2EV) to highlight the clarity of the picture. Exposure compensation is a shooting method that consciously changes the "appropriate" exposure parameters automatically calculated by the camera to make the photos brighter or darker. Photographers can adjust the brightness of photos according to their own ideas to create unique visual effects.

How to adjust the exposure depends on the photographer himself, but one thing is certain, that is, when shooting portraits, the principle of "when to increase compensation and when to reduce compensation" should be followed. The choice of brightness is ultimately determined by the photographer's eyes, but there are certain principles: generally speaking, compensation should be increased for objects with more white and high brightness; Large black and dim objects should be compensated less.

This metering mode of the camera has a great influence on the accuracy of metering, because the automatic metering system can't get the correct exposure value when shooting a large area of black and white. However, this defect of the camera can be compensated by the "exposure compensation" function. Exposure compensation is a function of automatic camera exposure adjustment, and its function is to make subtle exposure adjustment according to exposure needs on the basis of automatic metering, also known as EV adjustment.