Experimental steps of photographic aperture

Zero-based photography and exposure aperture

1. What is the aperture?

1. What is an aperture?

Aperture is a device used to control the amount of light entering the photosensitive surface of the fuselage through the lens.

2. The numerical value of the aperture

In order to express the aperture size, we use the f number, which is recorded as F 1. Aperture is not equal to f number. On the contrary, the aperture size is inversely proportional to the f number, which is also called the aperture number.

Second, the aperture setting

1. Method 1

The zoom lens can directly change the focal length by rotating the zoom ring, and the aperture size will also change accordingly. The larger the focal length, the smaller the aperture.

2. Method 2

In the case of M file or AV file, the aperture value can be changed by rotating the instruction dial on the camera (different camera positions are different).

Third, the aperture function

Function one

1. You can adjust the amount of light entering the lens.

For example, domestic kittens always shrink their pupils into a line during the day, and at night they automatically make a round hole in Zhang Kaicheng. So in the same way, when taking pictures, the aperture should be narrowed when the light is strong and opened when the light is dark, that is to say, the smaller the F value of the camera (other parameters remain unchanged), the more favorable it is for shooting at night.

2. regularity. The larger the aperture, the more light enters and the brighter the picture. The smaller the aperture, the less light enters and the darker the picture.

Action 2

1. Aperture is the most important factor to determine the depth of field. For example, nearsighted friends, if they don't wear glasses, always habitually squint at things, so they can often see things clearly. To use photographic terminology, this is called: narrowing the aperture (pupil) and increasing the depth of field!

2. regularity. Small aperture (large aperture value) deep scene. Large aperture (small aperture value), scene depth.

Fourth, the actual shooting skills

Small aperture application.

Large aperture applications.

Five,

5. Summary

1. Know the aperture. Aperture is a device used to control the light weight of light entering the photosensitive surface of the fuselage through the lens.

2. The aperture value indicating the aperture size is expressed by f number and recorded as F/. The light graph is not equal to the f number. On the contrary, the size of the aperture is inversely proportional to the size of the f number, also called the aperture number.

3. Aperture setting

Method 1: the zoom lens can directly change the focal length by rotating the Tang dynasty ring, and the size of the light map will also change. Usually, the larger the focal length, the smaller the aperture.

Method 2: In the case of M file or AV file, the aperture divergence can be changed by rotating the instruction tray on the camera (different camera positions are different).

4. The function of aperture

How much light can be adjusted to enter the lens? The larger the aperture, the more light enters and the brighter the picture. The smaller the aperture, the less light enters and the darker the picture.

Aperture is the most important factor to determine the depth of field, including small aperture (large aperture value), depth of field, large aperture (small aperture value) and depth of field.