What do Nikon fixed-focus lenses G and D mean respectively?

G=g lens

D lens: distance

Focal length data transmission technology

Represents that the lens can return focal length information, which is

3d (brightness, contrast and distance of the scene) matrix photometric sum

level signal

Control the balance flash. Introduced in 1992.

G lens

Unlike D-lens, this lens has no aperture ring design, aperture adjustment must be completed by the body, and it also supports 3d matrix metering. This design reduces the weight and production cost of the lens. This lens is completely compatible with f6, f5, f 100, f80, f65, f60, f55, f50, f40 1, pronea, digital full and digital aps system bodies of the film machine. For f4, F90, f70 and F8065438+, the G-type nikkor lens is easier to operate, and there will be no misoperation in theory, because it does not need to manually set the minimum aperture. This is a continuation of the plastic autofocus lens, which is suitable for photographers who almost never set the lens manually. Now Nikon has the trend of popularizing G-heads.

At present, no new varieties of D-heads have been developed, and the new heads are all G-heads with lens motors, so it can be considered that the new heads with G are compatible with d3000, d3 100, d5000100 without fuselage motors. But whether the prefix is af-s is the criterion to judge whether to use the lens motor.