How to choose the location of metering point

We use different metering points to measure light, which will make the picture have different brightness changes. Simply put, if you use the dark part of the dark part to measure light, then the brightness value under this dark part value will be accurately exposed, and the brightness area will be overexposed or the highlighted area will be dead white. If the brightness of the brightness area is used for photometry, then the brightness under this brightness value will be accurately exposed, and the darker area will be underexposed or the dark area will be dead black.

So at this point, the correct choice of metering point requires us to distinguish the light and dark areas in the picture, which extends to the need to analyze the light source in the picture. Let's take a look at the photos below.

From this picture, we can see that the light in the picture shines on people through the window to form different light and shadow changes. There are bright areas on the face, bright areas on the forehead, dark areas on the wall behind the characters, and the rest are pure black areas. From the analysis of light and shadow distribution, we know that this photo is a photo of Gao Fancha, also known as a hard tone photo. Let's roughly analyze where the photographer chooses the metering point. There are many dead black parts in the dark area, and there are areas with overexposure of highlights on the forehead. Only the transparent area of the face belongs to accurate exposure. We know that the photometric point chosen by the photographer is on the human face.

This photo is a portrait photo. Let's take a look at the overexposed part of the picture. First, the window is overexposed, the calf is overexposed, and the back is overexposed. Judging from the tone division, this photo is a high-profile photo. There are many highlighted areas in the picture, and the details of the highlights are lost. Let's roughly analyze the photometric point of this photo. The accurate part of the overall exposure of the picture is the human face. Because people shoot in the reverse direction, the camera can accurately expose the face area when choosing face metering, and the brighter area will be brighter or even overexposed.