What do depth of field lenses and depth lenses mean?

Depth of field lens: It is the range of the focus. It can blur the background to highlight the subject, or it can capture a clear background. In optics, especially in video or photography, depth of field (DOF) is a description of the distance range in space that can be clearly imaged.

Depth lens: Using different light positions, light ratios, light effects and other processing methods, you can form a depth-rich image under the light shape. Use photography objectives of different focal lengths to achieve different apertures and Shooting at object distance can create different depth of field ranges in the picture. In film creation, selecting and processing exterior scenes, designing and setting up scenery must provide a certain sense of depth for future shots.

In fact, depth generally refers to adjusting the depth and clarity of the front and rear scenes, which ultimately affects the depth of field effect.

Extended information

When shooting, there are three determining factors that affect the depth of field:

1. Lens focal length. The longer the focal length of the lens, the smaller the depth of field; the shorter the focal length, the larger the depth of field.

2. The distance of the subject. The farther the distance, the greater the depth of field; the closer the distance, the smaller the depth of field.

3. The size of the aperture. The larger the aperture, the smaller the depth of field; conversely, the smaller the aperture, the larger the depth of field. Lenses with a large aperture can capture a wider range of clear images, which is also an important reason for the development of lenses with a large aperture.

In current products, some single-lens reflex cameras have depth-of-field prediction buttons, so the depth of field can be predicted before pressing the shutter.

Reference: Baidu Encyclopedia - Depth of Field Lens

Reference: Baidu Encyclopedia - Depth Sense