The AF-S NIKKOR 85mm f/1.8G Lens from Nikon is a fast, compact FX-format prime medium telephoto lens. Though optimized for FX-format DSLR cameras, the lens is equally adept at serving any Nikon DX-format DSLR. The combination of its mid-range telephoto design and a fast f/1.8 aperture make it an excellent option for shooting both still images and HD video in low light scenarios. Available light shooters will love the wide-open effect when shooting intimate portraits; in-focus subjects will stay sharp, while distracting backgrounds will melt into a pleasing soft blur. When mounted on a DX-format DSLR, this 85mm prime delivers an apparent focal length of approximately 127mm. The lens boasts Silent Wave Motor technology (AFS) and Internal Focus for fast and quiet autofocus that won't alter the length of the lens, thus preserving working distance throughout the focus range. The Silent Wave Motor utilizes ultrasonic (inaudible) vibrations instead of a gear system to focus the lens, offering beautifully smooth, silent and accurate autofocus operation.When fine manual focusing is required, just rotate the lens focus ring. The M/A mode switch offers a seamless override of the AF system with practically no time lag at all! Nikon's Super Integrated Coating (SIC) improves light transmission and provides better color consistency and minimized flare. The AF-S 85mm f/1.8 is lightweight, fast, and easy to tote around. Weighing in at 8.0 oz less than the venerable 85mm f/1.4 - shooters that favor prime lenses can toss this optic in their gear bag without hesitation - it's small enough and light enough to take along everywhere!