How to get correct exposure for zero-based photography?

Hello everyone! What I bring to you today is the use of metering and the difference between different metering modes.

1. What is photometry?

Photometry means that the camera measures the light of the picture, so that the camera can be exposed correctly and take photos with correct brightness.

Second, the photometric scale

There is a light measuring ruler in the camera. When the scale points to "0", it means that the exposure is normal; When left, it means underexposure; When it is correct, it means that the exposure is normal.

3. There are four measurement modes: evaluation measurement, point measurement, partial measurement and central key average measurement.

1. But usually only spot metering and evaluation metering are used.

2. The measuring mode is only different in "measuring area" and "calculating weight".

Fourth, evaluate photometry.

Evaluation photometry is the most used photometry mode, which divides the picture into multiple areas; Each area is measured independently, and then the average value of the whole picture is calculated accordingly.

1, features: the overall light in the framing range is relatively uniform, the contrast of the dark part of the whole picture is not too large, and the exposure of the photos taken is basically accurate.

2. Applicable scenes: The average metering mode is suitable for shooting scenes with uniform light in the whole picture, such as scenery photography and sunshine environment.

Verb (abbreviation of verb) partial measurement

Part of the photometry is a photometry element, which measures the light in the range of 12% in the center of the picture and weighs it to get the photometry result. This mode is similar to spot metering mode, except that its range is slightly larger than spot metering.

1, features: the overall light is uniform within the framing range, the contrast of the dark part of the whole picture is not too large, and the exposure of the photos taken is basically accurate.

2. Applicable scenes: This metering mode is suitable for subjects such as stage photography and sports photography.

Six, the central key measurement

The metering area of the central key metering accounts for about 20%-30% of the framing picture, and the metering is mainly based on the brightness of the central area of the picture, while the other areas of the picture are given average metering.

1, features: center key metering is less convenient than average metering and less accurate than spot metering, but more accurate than average metering and more convenient than spot metering.

2. Applicable scenes: The average metering mode is suitable for shooting scenes with uniform light in the whole picture, such as scenery photography and sunshine environment.

Seven, point side lights

As the name implies, central focus photometry is to measure a point. The "point" of spot metering generally refers to the area of 1%-5% of the framing range, which is usually in the same position as the focus point.

1, features: the advantage of spot metering is "accuracy". Spot metering is most suitable for shooting in the environment with complex light and large light difference ratio, which can accurately control the exposure of the picture.

2. Applicable scene: This metering mode is suitable for shooting in an environment with large light contrast. When measuring light in bright or dark parts, the whole picture will have a great contrast effect.