Understand the basic knowledge of SLR lens (what are the basic knowledge of SLR lens)

long shot

wide-angle lens

standard lens

Main lens

Low power photographic lens

First of all, the standard lens

A standard lens refers to a lens with a viewing angle of about 50, and its focal length is usually between 40 and 55 mm, which is basically equal to the diagonal length of the shooting picture. The perspective of standard lens is very similar to the perspective of human eyes, and the relationship between the shot scene and the perspective observed by human eyes is close, and the picture is not distorted, which can give people a documentary visual effect. Because the picture composition is relatively fixed and the shooting range is limited, it is suitable for snapshot and ordinary shooting.

Second, the telephoto lens

A telephoto lens refers to a lens whose viewing angle is smaller than that of a standard lens, whose focal length is longer than that of a standard lens, and whose focal length is longer than the diagonal of the shooting picture. It is also called a telephoto lens. It can be divided into telephoto lens, telephoto lens and super telephoto lens.

Third, wide-angle lens.

Wide-angle lens refers to a lens with a larger viewing angle than the standard lens, a shorter focal length than the standard lens and a shorter focal length than the diagonal length of the shooting picture, also known as "short-focus lens". Wide-angle lenses are divided into ordinary wide-angle lenses and ultra-wide-angle lenses.

Fourth, zoom lens.

Zoom lens means that photographers can take photos of different sizes by standing in the same position and changing the focal length of the lens. This kind of lens is convenient and quick to use, which reduces the trouble of replacing the lens. However, it will affect the imaging when zooming, and the imaging quality is not as good as that of the constant focal length fixed focus lens.

Five, fixed focus lens

Fixed focus lens refers to a lens with a fixed focal length. Compared with zoom lens, fixed-focus lens has the advantages of small distortion, fast and accurate focusing speed and large aperture to obtain better depth of field effect. At the same focal length, the picture taken by the fixed-focus lens is clearer, which is suitable for taking still pictures such as people's photos, but not for dynamic pictures.

Six, macro lens

Macro lens is a kind of lens that specializes in shooting tiny objects, which can show the smallest part of the object. Macro lens has the advantages of narrow viewing angle, small depth of field, high resolution, minimal picture distortion and good color reproduction effect, which is suitable for shooting insects and flowers and showing the details of goods in commercial product advertising photography.