Why are fixed lenses good at making light?

Why the fixed lens is good at creating light: Because the fixed lens frame is fixed.

First, fix the lens.

A fixed-focus lens is a lens that cannot change the focal length, also called a fixed-focus lens. In the process of shooting a lens, the camera position, lens optical axis and focal length are fixed. Fixed lens is a static modeling method, the core of which is that the frame attached to the screen is not moving, but it is not completely equivalent to art works and photographic photos. The characters in the picture can move freely, draw a picture, and the light and shadow of the same picture can also change.

Fixed the problem that the external motion factors of the picture disappeared. The range of the picture that can be seen through the camera viewfinder is consistent with the viewing area. Fixed the picture's viewpoint is stable, which accords with the visual experience of people's daily life. It is different from the feeling of "browsing" usually expressed by translation and panning, and it is also different from the feeling that the viewpoint moves forward or backward by pushing and pulling. A fixed lens can be an element of a group of lenses or a carrier of montage inside the lens.

Second, the characteristics of fixed photographic lens

The fixed photographic lens is an irreplaceable lens on the camera, also known as the original lens. Corresponding to this is the zoom lens, which can be adjusted at different focal lengths. Fixed photographic lens can not adjust the focal length, but the optical quality is higher and the maximum aperture is larger. Because no mechanical structure is needed to adjust the focal length, the fixed photographic lens can be designed to be smaller and lighter, so it is widely used in cameras of photographers and professional photographers.

The fixed photographic lens is also extensible. They can extend their functions by using filters, such as aurora filters and polarization filters. Filters can be used to adjust color balance, reduce luster and improve contrast, thus creating more unique photographic effects. Some fixed photographic lenses can also use additional lenses or adapters to expand their focal length and field of view. These additional devices can make the fixed photographic lens more flexible and meet different shooting needs.