What are aperture and depth of field?

Small aperture F8: The photos are dull and clear; Small aperture F2.8: The photo is bright and fuzzy.

1. What is the aperture?

A device used to control the amount of light entering the photosensitive surface of a fuselage through a lens, usually inside the lens. The aperture is represented by f on the camera, such as F/2.8, F/ 1 1, etc. The larger the f value, the smaller the aperture, the less light entering and the darker the photo. The smaller the f value, the larger the aperture, the more light entering and the brighter the photo. The smaller the aperture f is, the larger the aperture is, and the more light enters per unit time, and the light entering at the upper level is exactly twice that of the lower level.

2. What is the depth of field?

The depth of field refers to the range of the distance between the front and back of the object measured by the camera lens or other imagers, which can obtain a clear image. It can be understood that the depth of field will affect the blur of the photo. The smaller the depth of field, the less clear parts in the picture, and the better the photo blur effect. The greater the depth of field, the more clear parts in the picture, and the worse the blur effect of the photo.

3. What are the factors that affect the depth of field?

There are three main factors that affect the depth of field: aperture, focal length and object distance.

1) The larger the aperture, the smaller the depth of field and blur; The smaller the aperture, the greater the depth of field and the clearer it is.

2) The longer the focal length, the smaller the depth of field and blur; The shorter the focal length, the greater the depth of field and the clearer it is.

3) The greater the object distance, the greater the depth of field and the clearer it is; The smaller the object distance, the smaller the depth of field and blur.

4. The relationship between aperture and depth of field

Aperture is a factor that affects the depth of field. The larger the aperture (the smaller the f value), the smaller the depth of field, and the better the blur effect of the photo. The smaller the aperture (the larger the f value), the greater the depth of field, and the worse the blur effect of the photo.

5. How to adjust the depth of field and aperture?

If you want to shoot close-ups, such as close-ups of people, use large aperture+small depth of field; If you want to take a picture of the scenery, take a group photo, etc. , with small aperture+large depth of field.

Close-up of people: maximum aperture value

Group photo: F 1 1- 16

Food still life: F8- 1 1

Scenery shooting: F8- 1 1

Close-up of flowers: F 1.2-4

Starry sky: F 14-5.6

Orbit: F 16-20

6, aperture summary

The picture darkens: the larger the aperture value f is, the smaller the aperture is, and the less light enters, the darker the picture is.

Brighten the picture: the smaller the aperture value f, the larger the aperture, and the brighter the picture.

Blur: The smaller the aperture value f, the larger the band. The smaller the depth of field, the smaller the clear range.

The clearer: the smaller the aperture value f, the smaller the light. The greater the depth of field, the greater the clear range.

Turn into light: the larger the optical perimeter f, the smaller the aperture, the longer the light, and the light source gradually turns into light.

Become a light spot: the aperture value f is small, the aperture is large, the light is short, and the light source gradually becomes a light spot.