The difference between near focus and far focus

The difference between near focus and far focus:

1, different depth of field:

The depth of field of near focus is large, and that of far focus is small.

2. Different perspectives:

Wide near-focus viewing angle and small far-focus viewing angle.

3. The deformation degree of visual angle is different.

Near-focus deformation is large, and far-focus deformation is small.

At the same distance, the short-focus shooting angle is large, the subject is small and the depth of field is long; Telephoto shooting has small viewing angle, large subject and short depth of field. Fingers hold down the screen to expand or contract outward in order to adjust the far and near focal length.

Extended data:

Brief description of focal length:

The focal length is formed by the optical lens of the camera lens. A group of lenses with curvature (convex or concave) on both sides or one side are installed in the metal tube of a camera or projector to form a comprehensive lens.

The light emitted from different parts of the object, after passing through the lens, is focused on a point on the negative, so that the image has a clear outline and real texture. This point is called the focus. The focal length is the distance from the point in the lens of the lens to the point where the light can be clearly focused.

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