Camera Lens Classification

There are many models and types of lenses. The basic types of lenses are divided into: zoom lens, fixed focus lens, zoom lens.

A zoom lens is a camera lens that can change the focal length within a certain range. In this way, different wide and narrow viewing angles can be obtained. Not only can you get images of different sizes. Can also get different scenery. The zoom lens does not change the shooting distance. The shooting-range can be changed by changing the focal length. So it is very helpful for picture composition. This is very convenient when traveling. It not only reduces the number of photographic equipment carried. It also saves time to change the lens.

Fixed focus lens

A fixed focal length lens refers to a lens with only one fixed focal length. Each fixed focus lens has only one focal length, or only one field of view.

If divided by focal length. Divided into wide-angle lens, standard lens, telephoto lens.

Standard lens

If the lens is divided by the angle of view. The lens angle of view is between 40° and 55°. They are all standard lenses. If the focal length is basically the same as the diagonal length of the film. Such a lens is called a standard lens. The focal lengths of several standard lenses of common 135 cameras have many specifications. Such as 45 mm, 50 mm, 55 mm, 58 mm, etc.

Wide-angle lens

A lens with a focal length less than the diagonal length of the film is called a wide-angle lens. There are many types of wide-angle lenses for the 135 camera. The focal length and viewing angle are different. According to different functions, it can be divided into three types. They are ordinary wide-angle lenses, ultra-wide-angle lenses, fish-eye lenses, etc.

Telephoto lens

Telephoto lenses are also called telephoto lenses. The focal length of this type of lens is relatively long. And it is much larger than the diagonal of the negative. They can take larger shots of distant scenes. There are multiple focal lengths in the current common 135 camera telephoto lens. Such as 135 mm, 150 mm, 200 mm, 250 mm, 300 mm, 500 mm, 1000 mm, etc.

Other lens

On this basis, there are also some other lens classifications. Such as fish-eye lens, macro lens, shift lens.

Other lens

On this basis, there are also some other lens classifications. Such as fish-eye lens, macro lens, shift lens.

Fish-eye lens

A fish-eye lens is a lens with a focal length of 16mm or less. Its viewing angle is close to or equal to 180°. It is an extreme wide-angle lens. "Fish-eye lens" is its common name. In order to make the lens reach the maximum photographic angle of view. The diameter of the front lens of this photographic lens is very short. And is parabolic protruding toward the front of the lens. This is quite similar to the eyes of a fish. Therefore, it was named "fish-eye lens".

Macro lens

Macro lens is a special lens used for macro photography. Mainly used for shooting very subtle objects, such as flowers and insects. In order to accurately focus on subjects that are very close. Macro lenses are usually designed to stretch longer. To keep the optical center as far away from the photosensitive element as possible. In the design of the lens group. We must also pay attention to controlling deformation and chromatic aberration at close range.

Shift lens

The shift lens must stand on the ground when shooting buildings. In order to capture the whole picture, the camera has to be slightly upward. Because the lower part of the building is closer and the upper part is farther away. It will produce a convergence effect of "big down and small up". The lens itself is not deformed. The reason for this phenomenon is the perspective relationship.