The Nikkor AF-S 85mm f/1.8 G - is a compact, state-of-the-art, high-aperture mid-range telephoto lens for FX and DX-format SLRs. Ideal for portraits, it perfectly combines classic focal length and high-speed aperture. A focal length of 85mm (127.5mm when used with a Nikon DX-format SLR) allows for close-up hots of the head and shoulders in incredible detail. The responsive f / 1.8 aperture strikes the perfect balance between sharpness and bokeh for smooth bokeh and good sharpness in low light. This lens can also be used with entry-level DSLR cameras without a built-in autofocus motor (Nikon D3100, Nikon D5100, etc.). The built-in SWM ultrasonic motor provides quiet and accurate autofocusing.