Fixed focus lens, how to focus? The focus has been determined. Is there a distance limit for photography?

The fixed-focus lens can focus on objects at different distances by adjusting the focusing ring, so as to have clear imaging. There is a certain distance limit.

Nowadays, many lenses (including fixed-focus lenses and zoom lenses) support autofocus function (AF), which is driven by the motor in the mirror or the motor in the body.

First of all, the lens is divided into fixed focus and zoom.

Fixed-focus lenses usually have excellent imaging, which is inconvenient to use because of the fixed focal length of the lens: to take a panoramic view, photographers can only stay away; In order to take close-ups, the photographer must lean forward. People are sometimes influenced by the environment, such as the tiger in front and the cliff behind.

Usually, the imaging quality of zoom lens can't catch up with that of fixed-focus lens, because the focal length of the lens can be changed, so it is very convenient to use: the photographer can stand still and rotate the zoom ring to enlarge it; Turn the camera wide in the opposite direction.

Second, focus.

Whether it is a fixed-focus lens or a zoom lens, it is necessary to focus objects at different distances by adjusting the focus ring in order to have clear imaging.

Nowadays, many lenses (including fixed-focus lenses and zoom lenses) support autofocus function (AF), which is driven by the motor in the mirror or the motor in the body.

Extended data:

Lens classification:

1. lens

The classification of lenses can be classified according to focal length, aperture and lens telescopic adjustment.

According to the focal length, there are fixed focal length, telescopic, automatic aperture or manual aperture.

According to the digital size of the focal length, there are standard lenses, wide-angle lenses and telescope heads.

According to the classification of aperture, there are fixed aperture, manual aperture and automatic aperture.

According to the lens telescopic adjustment mode, there are electric telescopic lenses, manual telescopic lenses and other types.

2. Video recording

Lens is the basic unit of film and television creation. A complete film and television work is composed of one shot after another. Without an independent lens, there would be no film and television works.

Through the combination of multiple lenses and the performance of design, the production of the whole film and television work lens is completed, so the application skills of the lens also directly affect the final effect of the film and television work.

General lens expression techniques: pushing lens, moving lens, following lens, shaking lens, turning lens, pulling lens, throwing lens, shaking lens, etc.

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