What does the macro lens do?

Macro lens is a special lens used for macro photography, which is mainly used to shoot very fine objects, such as flowers and insects. In order to focus on the subject at a very close distance correctly, the macro lens is usually designed to be longer, so that the optical center is as far away from the photosensitive element as possible. At the same time, in the design of lens group, we must also pay attention to the control of deformation and chromatic aberration at a close distance. The focal length of most macro lenses is larger than that of standard lenses, so it is not completely suitable for general photography.

macro photographic lenses generally have two structures. One macro photography lens adopts the structure of built-in telescopic lens barrel, and the other adopts the structure of exchanging the front and rear positions of optical lens groups in the lens.

it is difficult to alternate close-up photography with ordinary photography by adding close-up accessories to ordinary photography lenses. Macro photography lens is different, its close-up does not depend on other close-up accessories, all close-up operations are carried out on the lens itself, and it can focus continuously from close-up to infinity, so that it can be quickly adjusted from close-up state to ordinary photography state, which provides convenience for photographers to alternately take close-up photography and ordinary photography. The macro lens was originally designed to be used for copying flat objects (files, photos, paintings, etc.), and the requirements for the lens are naturally high image reproduction ability and perfect reproduction level. The biggest feature of the macro lens is that the imaging surface of the lens is a flat image field at close range, rather than the image field bending like the bottom of a pot like the common lens. The purpose of this design is to obtain the same quality of the center and edge image of the photo when remaking articles such as documents and paintings. Using macro lens to shoot tiny natural scenery will give people a wonderful visual experience, because people can't see the microscopic scene generally, and the high-definition image that macro lens can get itself will also make people get an image shock.