What are the three types of lenses for digital cameras? What is the purpose of separation?

The lens of digital camera can be divided into wide angle, telephoto and standard according to the range of focal length. These three types of lenses have their own advantages, the shooting themes are also different, and the corresponding images have their own characteristics. Standard lenses are cheap and have a strong sense of detail. In digital cameras, the standard lens is also called the head. The focal length and length of the standard lens are similar to the lens angle corresponding to the photosensitive element. For example, a 135 camera with a focal length of 50 mm has a viewing angle of about 53 degrees. The standard lens is closer to the visual angle range of human eyes when shooting, and the effect of shooting with the standard lens is relatively more like what the human eyes see directly and more realistic. The shooting details of the standard lens are very strong, giving people a sense of documentary.

Photographs taken with standard lenses, such as ordinary landscapes or portraits, have clearer picture quality and harmonious pixel ratio of the whole picture. Standard lens is an optical structure with excellent imaging, and the manufacturing cost of standard lens is quite low, and the price is relatively cheaper. It is one of the main lenses that many beginners buy.

The standard lens can be well corrected. The biggest advantage of the standard lens with good upper phase performance is that it can correct all kinds of phase differences, especially the horizontal hole difference, which makes the middle of the shot picture and its surroundings stand out, and the middle can show clear details. Another is that the aperture used by the standard lens is generally large, which occasionally makes the whole picture look dull, but for photographers, if they can take advantage of the imaging characteristics of the standard lens, some pictures with strong sense of detail are likely to be displayed, and the pictures are more real and natural.

Wide-angle lens can be used to shoot magnificent scenes, which is also called short-focus lens in digital cameras. This kind of lens can be divided into ordinary wide-angle lens and super wide-angle lens. Wide-angle lenses are generally used to shoot large scenes or entire transitions. Generally speaking, the focal length of a wide-angle lens is 24 ~ 38 mm and the viewing angle is 60 ~ 84 degrees, while the focal length of an ultra-wide-angle lens is 13 ~ 20 mm and the viewing angle is 1 18 degrees. Because the focal length of the wide-angle lens is relatively short, but the viewing angle is relatively large, if you live in some large scenes, you will use such a lens to shoot, which has the characteristics of relatively large shooting space, deep prospect and easy deformation.

Wide-angle lenses are suitable for expressing landscapes and buildings, and the works shot by multiple wide-angle lenses are relatively grand and have a very wide field of vision. The image taken by the wide-angle lens is much enlarged on the visual lens, which is wider than that seen by the human eye. The other is an image taken with a wide-angle lens. Generally speaking, Masaru Ibuka can display a clear picture in a considerable range. Third, the picture taken with a wide-angle lens has a stronger perspective effect. Different from the true naturalness of shooting with standard lens, wide-angle lens has a stronger sense of exaggeration and tension when expressing scenery.

In our daily shooting process, most photographers use wide-angle lenses to shoot landscapes and buildings. The whole vertical and horizontal dimensions of this kind of works are relatively large, and there are more photographic subjects that can be absorbed. Shooting with a wide-angle lens can highlight the characteristics.

The telephoto lens is suitable for scenery, people and stage, and the portrait is clearer. A telephoto lens refers to a lens with a long focal length, which is also called a medium telephoto lens and a super telephoto lens. Daily digital cameras use ordinary medium-long focal length lenses, which are relatively longer than standard lenses. For example, in a 135 SLR camera, a lens with a focal length of 70 to 300 mm is called a medium telephoto lens, and a lens with a focal length exceeding 300 mm is called a super telephoto lens. The telephoto lens is widely used to shoot landscapes, sports and people, especially when shooting wild animals. Most photographers will use this lens to shoot smart images at a longer distance, and the quality of the whole picture should be clearer.

The telephoto lens is huge and needs to be fixed with a tripod. Generally speaking, when using telephoto lens, because it is too big and heavy, it is easy to be unstable when shooting by hand, and the whole picture is blurred, so photographers usually use tripod when using telephoto lens. Using a tripod to fix can press the shutter at the fastest speed when shooting, so as to avoid blurring the shooting work caused by manual swing.

Generally speaking, the lenses of digital cameras are mainly divided into three categories: standard lenses, telephoto lenses and wide-angle lenses. Each lens has its own characteristics, including what kind of lens is used in the shooting process, depending on the picture tension that the photographer wants to show. The images taken by the three lenses are fresher by the standard lens, deeper by the natural wide-angle lens and more agile by the telephoto lens. Photographers can choose different lenses to shoot according to this.