The difference between the Nikon 50mm 1.4D and this Nikon AF-S 50mm f/1.4G Lens is a built-in Silent Wave Motor which enables autofocus with the D60/D40x/D40 DSLRs.

The Nikon 50mm 1.4G also boasts a brand-new optical system with 8 elements in 7 groups for improved image quality, a circular aperture diaphragm for more attractive background blur, and a barrel design which does not change length on focusing. The Nikon 50mm is ideal for travel, event, environmental and general photography in a wide variety of conditions, with superb optical formula and an ultra-fast f/1.4 maximum aperture. The Nikon 50mm 1.4G wide-aperture standard lens with high-quality optics and Nikon’s exclusive Silent Wave Motor (SWM) for whisper-quiet operation. The Nikon 50mm features a large maximum aperture of f/1.4 that ensures a bright viewfinder image, and is ideal for low-light shooting situations or when a shallow depth of field is desired. An ideal portrait lens when used on a Nikon DX-format digital SLR, approximating the angle of view similar to that of a 75mm lens on a Nikon FX-format digital SLR or a 35mm film camera.