There are so many signs on Nikon lens? 2

Auto focus (auto focus).

The meaning of AF-S

Built-in SWM (Silent Wave Motor) independently developed by Nikon for AF drive. With the SWM lens, you can track the rapid movement of objects.

The focus is fast and quieter than the lens driven by the fuselage. Best for sports photography or shooting wild animals. AF-S lens, for F4 F5, F 100,

AF photography can be carried out on F90, F90X, F80, F70D, F65, D 1 series, D 100 and other fuselages.

The meaning of DX

DX is relative to full FX, that is, APS frame, which is smaller than full FX. The lens with this logo will produce black circles when used in Quan Huafu, and can only be used in APS frame machines, such as D40, D90 and D300. DX lens is not recommended for high-end machines such as D3.

The meaning of d

D is the abbreviation of Distance, and an encoder linked with the lens focus ring is built in to transmit the distance information of the subject to the fuselage, so as to realize more accurate exposure control and make 3D-RGB multi-zone matrix photometry (F5 fuselage), 3D multi-zone matrix photometry (F 100, F80 fuselage, etc. ), 3D multi-zone BL flash (F5, F 10) The lens with this distance signal is called D lens, and the D function is the original function of Nikon. MF lens has d function. At present, only one lens is PC 85F2.8D macro (manual exposure only).

The meaning of g

G is the identification symbol of the lens without aperture ring. G-type lens is a new series of lenses, without aperture ring, and the aperture can be controlled on F5, F 100, F80 and F65 fuselage, corresponding to the existing Nikon AF SLR fuselage. In addition, like the D-lens, the G-lens also has the function of transmitting object distance information to the fuselage. Because there is no need to set the minimum aperture, the handling performance is improved.