Introduction to photography that Xiao Bai must learn.

Introduction to photography that Xiao Bai must learn.

Learning photometry

Photometric determination

It means that the camera measures the light around the shooting picture, and then automatically sets the exposure according to the measured light brightness, so as to take a photo with appropriate brightness. The photos taken by different metering modes have different light and shade.

For example.

Our eyes will automatically adjust with the light environment, and we can take pictures in the dark or sunny environment to see the surrounding situation clearly.

The same is true of the camera, which will give the combination of aperture and shutter by measuring light to achieve correct exposure. For example, when the camera is set to "Aperture Priority" mode, the lens is aimed at a specific object to be measured, and then the shutter is half pressed to measure light. At this time, the system will automatically give a corresponding shutter value, combined with the set aperture, to make a group of exposures that the camera thinks are correct.

Evaluation photometry

This mode is one of the most commonly used metering modes, and it is a measure of the overall lighting effect on average, so it is especially suitable for shooting large scenes with uniform light, the most typical of which is landscape photography. Canon called it "evaluation photometry" and Nikon called it "matrix photometry".

Spot photometry

Spot metering refers to metering a point, which is usually the center of the picture, accounting for about 9% of the whole picture. The advantage of this method is that it can measure the most suitable place in a certain picture according to the photographer's preference, especially in the scene with strong contrast between light and shade, or the subject can measure the light correctly without interference from other nearby lights. It is often used in strong backlight and other scenes that only want to measure the height of human face.

Partial measurement

Partial metering is usually considered as a branch of spot metering. The metering range is slightly larger than spot metering, which is indicated by an icon. It is more suitable for shooting portraits, stages and other subjects. A very common scene is shooting people against the light.

Central key average photometry

In the central focus average metering mode, the metering will be biased towards the center of the whole picture, taking into account the edge of the picture, so this metering mode is suitable for shooting scenes with the subject in the center of the picture, such as portraits, still lives, macro, buildings and so on.

Photometric summary

1, metering mode: evaluation metering, metering area: it is the default metering mode of most cameras, metering the whole picture. Application scene: It is often used in scenes with uniform light.

2. metering method: partial metering, metering area: the metering area will be larger than spot metering, and only 9% of the central area will be metered. Application scene: it can be used to take close-ups of portraits.

3, metering method: spot metering, metering area: a point in the shooting picture is metered, only about 3.8% of the central area is metered. Application scenario: It can be used in strong backlight and other scenarios. I don't want to only measure the height of a person's face.

4. Photometric mode: the central key points are averaged, and the photometric area: the central key points are averaged to the whole. Application scene: It is often used for portraits, documentaries, etc.