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First, what is the depth of field
The depth of field refers to clear focus of before and after acceptable clear area. When the very shallow depth of field, the focus plane is a very thin layer on the object falls, which in parallel to the photosensitive member where the digital camera plane. When the impact of the depth of field conditions change, such as when the lens aperture shrink, which will significantly extend the range of a clear focal plane of the lens front and rear. Through the depth of field control, the photographer can control the main picture and background environment definition.
In the basic method of composition, the use of depth of field blur background processing is very common. Use a large aperture or focal length or shorter shooting distance, you can create a shallow depth of field effect. A shallow depth of field can be complex background blur, and highlight the main subject.

The figure is a lovely scene performance of a cat lying on the table. Photographer with a relatively shallow depth of field, the main subject highlight, creating a beautiful and soft bokeh picture effect.
Second, the influence factors of depth of field
When specific shooting, photographs should be used deep depth of field, depending on the photographer's message. Top left to show a close-up of a pet dog, shot with f/3.2, shallow depth of field, focusing on pet dog's eyes, the dog's eyes are perfectly manifested.

In creation of photography, the three main factors affecting the depth of field below, we can adjust these items to change the depth of field effect.
1 The size of the aperture when shooting
2 lens focal length
3 distance of the camera and the subject
Depth of field specific relationship with the three elements as follows.
Aperture size: the larger the aperture, the smaller the aperture value, the more shallow depth of field; smaller the aperture, the larger the aperture value, the deeper the depth of field.
Lens focal length: the longer the focal length, the shallower the depth of field; shorter the focal length, the deeper the depth of field.
Shooting distance: The closer the camera and the subject distance, the more shallow depth of field; the farther the camera and the subject distance, the deeper depth of field.
The depth of field refers to clear focus of before and after acceptable clear area. When the very shallow depth of field, the focus plane is a very thin layer on the object falls, which in parallel to the photosensitive member where the digital camera plane. When the impact of the depth of field conditions change, such as when the lens aperture shrink, which will significantly extend the range of a clear focal plane of the lens front and rear. Through the depth of field control, the photographer can control the main picture and background environment definition.
In the basic method of composition, the use of depth of field blur background processing is very common. Use a large aperture or focal length or shorter shooting distance, you can create a shallow depth of field effect. A shallow depth of field can be complex background blur, and highlight the main subject.

The figure is a lovely scene performance of a cat lying on the table. Photographer with a relatively shallow depth of field, the main subject highlight, creating a beautiful and soft bokeh picture effect.
Second, the influence factors of depth of field
When specific shooting, photographs should be used deep depth of field, depending on the photographer's message. Top left to show a close-up of a pet dog, shot with f/3.2, shallow depth of field, focusing on pet dog's eyes, the dog's eyes are perfectly manifested.

In creation of photography, the three main factors affecting the depth of field below, we can adjust these items to change the depth of field effect.
1 The size of the aperture when shooting
2 lens focal length
3 distance of the camera and the subject
Depth of field specific relationship with the three elements as follows.
Aperture size: the larger the aperture, the smaller the aperture value, the more shallow depth of field; smaller the aperture, the larger the aperture value, the deeper the depth of field.
Lens focal length: the longer the focal length, the shallower the depth of field; shorter the focal length, the deeper the depth of field.
Shooting distance: The closer the camera and the subject distance, the more shallow depth of field; the farther the camera and the subject distance, the deeper depth of field.
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