What is a wide-angle lens

Wide-angle lens is a photographic lens with shorter focal length, larger viewing angle, longer focal length and smaller viewing angle than standard lens.

The fisheye lens is a lens with a focal length of 16mm or less and a viewing angle close to or equal to180. It is an extreme wide-angle lens, and "fisheye lens" is its common name. In order to make the lens reach the maximum shooting angle, the front lens of this kind of photographic lens has a short diameter and protrudes to the front of the lens in a parabolic shape, which is quite similar to the fish's eyes, hence the name "fisheye lens".

Wide-angle photography is shooting with a wide-angle lens. The field of view of the wide-angle lens exceeds 45 degrees; 45 degrees is the approximate viewing angle of a standard or ordinary lens for a known diaphragm. In any picture, the wide-angle lens is always shorter than the normal focal length.

Extended data

Wide-angle lens characteristics

The basic characteristics of a wide-angle lens are its large viewing angle and wide field of vision. The range of scenery observed from a certain viewpoint is much larger than that seen by human eyes at the same viewpoint; The depth of field is long, which can show a fairly clear range; It can emphasize the perspective effect of the picture, be good at exaggerating the foreground and express the sense of distance of the scene, which is conducive to enhancing the appeal of the picture.

The focal length is shorter than the standard lens, but the viewing angle is wide. Suppose a standard lens and a wide-angle lens are used to shoot the same object at the same distance. The latter has a small image but a large shooting range. Usually, if taking pictures is limited by the region, some scenes that can't be taken with standard lenses can be taken with wide-angle lenses.

Therefore, wide-angle lenses are often used to shoot large-area landscapes, such as mountain scenes, wide buildings, parades and all indoor exhibits. The development is suitable, and the colors of the photos can be consistent with the brightness of the original scenery, which is helpful to express the atmosphere. Tone also refers to the tone of the whole picture, such as whether a photo is high (light) tone, low (dark) tone, strong contrast tone or soft and plain tone.

Reference source? Baidu encyclopedia-wide-angle lens