Canon's evaluation metering, central key average metering, spot metering?

1, Canon's evaluation photometry: first, cut the picture in the viewfinder into multiple areas, then judge the exposure of each area and the importance of each area in the whole picture, and finally get a exposure value that the camera thinks is accurate through various weights. This metering mode of dividing regions takes into account the whole picture, so the exposure value obtained is more accurate.

2. Center-focused average photometry: Give priority to the exposure of the central subject of the picture, then weight the exposure of the rest of the picture, and finally get a exposure value that the camera thinks is accurate. This metering mode was used a lot in the past, but after the evaluation of metering, matrix metering and multiple metering, this metering mode was almost not used.

Because evaluation photometry, matrix photometry and multiple photometry are more intelligent, the exposure obtained is more accurate. However, this photometry mode, which emphasizes that the center of the picture is the most important, supplemented by the rest, is suitable for taking close-ups of portraits, with buildings, flowers and other themes in the middle.

3. Spot metering: As the name implies, spot metering is a "point" of the measurement screen. This "point" is not a small point as you think. This point refers to the area of the picture 1%-3%. Spot metering is very useful if shooting in a complex lighting environment.

Extended data:

According to different types of measurement modes, the measurement range and adaptability are also different. What is suitable for most shooting scenes is the default setting of "evaluation photometry" mode, which takes the autofocus point used in autofocus as the center, pays attention to the focus of the subject while taking into account the overall balance of the picture, and calculates the photometry value according to the advanced algorithm to get the exposure value.

The narrowest metering range is the "spot metering" mode, which only responds to the brightness of the central part. Generally, it is enough to evaluate the metering mode. However, spot metering can be used when you want to quickly get the appropriate exposure of a specific object in a specific scene such as backlight. If it is general scenery photography, it is more convenient to choose evaluation metering mode to shoot.

But in the scene with complex light and shadow, spot metering mode is a better choice. Which metering mode to use depends on the photographer himself. As long as he can get the brightness he wants, this method can be said to be his ideal choice.

Canon official website-Understand the difference between metering modes.