What does macro lens mean?

Macro lens is a special lens for macro photography, which is mainly used to shoot very fine objects, such as flowers and insects. In order to focus on the object correctly at a very close distance, 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 should also pay attention to the control of close-range deformation and color difference. The focal length of most macro lenses is larger than that of standard lenses, which 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.