7D How to choose metering mode?

the choice of metering mode needs to be decided according to the shooting scene, light and shooting theme at that time, so we need to know the difference between several metering modes first.

First, let's understand the differences between several metering modes:

1) Evaluation metering is the standard metering mode of EOS cameras, which is suitable for most subjects. After detecting the position, brightness, background, front and back lighting conditions and other comprehensive lighting elements of the subject in the viewfinder, the camera sets the correct exposure for the main subject.

2) partial metering is very effective when the background is brighter than the subject due to backlight and other reasons. Photometry focuses on the center of the viewfinder, covering a part of the center of the viewfinder.

3) Spot metering is used for metering the shooting subject or a specific part of the scene. Photometry focuses on the center of the viewfinder, covering a small area in the center of the viewfinder.

4) The central focus averaging photometry focuses on the center of the viewfinder, and then averages the whole scene.

1. evaluation photometry: in most cases, evaluation photometry can get basically accurate exposure value. Therefore, it is suitable for shooting most scenes with uniform light and shade. If you master exposure compensation skillfully, it is suitable for shooting more scenes.

2. partial metering: Generally, it is often used for shooting backlit films.

3. Spot metering: If you are sure to ignore the surrounding parts, partial metering and spot metering can get more accurate exposure value. This will keep the subject exposed correctly, and the background will be too bright or too dark, which is generally used for macro and close-up shooting.

4. central key average metering: if you are sure about the surrounding parts, you can choose central key average metering. This subject is not particularly ideal, but the surrounding and background will not be too bright or too dark, and some considerations will be given. Suitable for shooting in the morning, sunset and sunset.

The metering system is dead and people are alive. When choosing metering mode, you should pay attention to it. Once the scene or the desired effect does not meet the standard of metering mode, you need to predict the light result. At this time, exposure compensation is the best choice, and the wide range of plus or minus 5 gears will make you very satisfied. In addition, in the actual shooting process, the choice of metering points in the latter three modes has a great influence on the metering results (for example, when metering, its coverage area only reaches 4%), which must be paid attention to when shooting.

In addition, in the evaluation metering mode, the metering result and exposure combination will be locked by half pressing the shutter, but not in the latter three modes, which will be locked only after you press the exposure lock button. Therefore, before moving the composition in the state of selecting the latter three metering modes, you must lock it first and then move the composition.

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