Nikon 50mm f1.4 G AF-S Lens

Nikon 50mm f1.4 G AF-S Lens

The Nikon AF-S 50mm f/1.4G lens is a fast, fixed focal-length Nikkor lens that incorporates the built-in Silent Wave Motor (SWM) enabling smooth and quiet autofocus with Nikon DSLR's including the D40, D40x and D60. The improved optical system delivers fantastic image quality minimising both flare and chromatic aberration while the use of a circular aperture diaphragm means out of focus background blur appears more natural. During focusing all the lens groups shift but the front element and filter mount do not rotate and the barrel length does not change, making it an ideal lens for close-up photography or when using SB-R200 Wireless Remote Speedlight units. The lens has has two focus modes, M/A (manual-priority autofocus) and M (manual focus). When mounted on a DX-format SLR, the picture angle is equivalent to a focal length of about 75mm in 35mm format. This lens is suitable for both FX and DX format cameras.

Technical Terms

G

G lenses do not have an aperture ring on the lens and must be controlled using the command dial on the camera.

DX Format

DX is a lens designed exclusively for their APS-C sensored DSLRs, but can be used on their full frame cameras like 35 mm SLRs and full frame digital SLRs like the D3 series and D700 DSLRs. All lenses designated as DX type can be used with DX format digital SLR cameras. Many Nikkor lenses designed for FX or 35mm film formats can also be used with DX format digital SLR cameras. The effect of using a Nikkor lens on a DX format camera will produce a magnification of the focal length of the lens by a factor of 1.5x (eg. a 50mm lens will produce the equivilant of a 75mm focal length).

FX format

The larger FX image sensor is virtually the same size as the 35mm film format which means that the focal length of a lens used on either format will be virtually the same. Many Nikkor auto focus and manual focus lenses can be used with FX format cameras.

AF-Silent Wave Motor (AF-S) is what Nikon calls their ultra fast Auto-Focusing lenses which utilise Nikons silent wave motor (SWM). This system works by converting travelling waves into rotational energy to focus the optics the ultrasonic waves move in a spiral pattern inside the barrel with the motor positioned on top of the waves driving it from below.