Ask a silly question: What do you mean by spot metering, center metering, center key average metering, average metering mode and multi-zone metering?

Taking a small area in the center of the viewfinder as the exposure reference point, the photometric area of most point cameras is 1% to 3%, and the camera takes the light measured in this narrow area as the exposure basis.

2, the central part of the measurement:

Only one area in the center of the picture is metered, and the metering range is about 3% to 12%. It is suitable for some scenes with complex light, where more accurate exposure is needed. The photo with accurate exposure of the subject can be obtained by using the central part metering.

3, the central key average measurement:

A traditional metering method, the metering area accounts for about 20%-30% of the framing picture, and metering mainly averages other areas of the picture according to the brightness of the central area of the picture.

4. Average measurement mode:

Divide 64 or 128 areas vertically and horizontally in the picture, and consider it as correct exposure according to the average gray level of 18%, and give the results of aperture and shutter speed.

5. Multi-area measurement:

The framing picture is divided into several photometric areas, and the exposure value of each area is calculated by integrating and weighting the whole area. The characteristics of photos taken in this mode are that the overall light is uniform within the framing range, and the contrast in the dark part is not large, so that more accurate photos can be obtained.

Baidu Encyclopedia-Measurement Method