Photographic exposure method

Students who study photography are most concerned about light and color. Do you know the method of photographic exposure? The following is the photographic exposure method I brought to you. Welcome to reading.

Methods-average exposure method

The average exposure method is an exposure method based on the average brightness of the subject, which is often used in landscape photography and group photography. In some cameras with automatic exposure control, comprehensive average photometry is often used to control exposure according to the average value of measured brightness.

It is a very complicated problem to calculate the average brightness of an object accurately. In actual operation, we usually observe the light-dark ratio of the brightest, darkest and middle bright parts of the subject first, and make exposure according to the middle light. The exposure meter can also be used to measure the average brightness and determine the corresponding exposure combination.

It should be pointed out that the use of average exposure does not mean absolute average.

First, it is difficult and unnecessary to calculate the accurate average brightness of the scene;

Second, it is required that the scenery reflected on the screen should be subject and secondary. When considering the average exposure of the coat, we should consider whether the subject can be better shown in the photo, and then we can determine what brightness value to use for exposure.

Thirdly, considering the need of photo contrast, in black and white photos, it can be controlled by intermodulation of exposure and development;

Fourthly, when the subject includes the sky, the brightness of the sky and the brightness of the scene cannot be averaged together, otherwise the average brightness of the jacket will be too large, resulting in underexposure.

Method 2: Method of limiting exposure

Limit exposure refers to the minimum exposure or maximum exposure allowed according to the tolerance of photosensitive film. In fact, it is the limit of exposure, so it is called extreme exposure.

Under extreme exposure, only the scene with the strongest brightness or the lowest brightness can be darkly displayed on the photographic film, which plays an important role in highlighting a certain detail and feature of the subject to the maximum extent. However, it can only be used if the other parts of the lost photo are acceptable.

Methods Three key exposure methods were used.

Whether the key exposure mode is based on the brightness of the subject is an exposure mode.

According to this exposure method, the subject can get the best display on the screen, and other scenes are poorly displayed, but this does not affect the quality of the photo. Emphasis exposure method is one of the commonly used exposure methods.

The key exposure method is mainly suitable for the situation that the brightness contrast of the scene is greater than the width of the photographic film, and the contrast of the scene is not large, but the shape and characteristics of the subject are expressed in order to highlight the subject.