Nikon 85mm Nikkor f1.8G AF-S Lens
The Nikon AF-S Nikkor 85mm f/1.8G is a fast aperture medium-telephoto portrait lens that’s optimised for use with full-frame Nikon digital SLR cameras. It provides an effective focal length of 127.5mm when used with a Nikon DX-format SLR. The Nikon AF-S Nikkor 85mm f/1.8G VR lens features a Silent Wave Motor (SWM) for quiet and accurate auto focusing, two focus modes, M/A (manual-priority auto focus) and M (manual focus), an iris diaphragm with seven rounded blades for a soft rendering of the out-of-focus areas, and a weather-sealed rubber lens mount. The optical formula comprises 9 elements in 9 groups and the Nikon AF-S Nikkor 85mm f/1.8G is fully compatible with entry level D-SLRs that do not have a built in auto focus motor.

Fast aperture, medium telephoto portrait lens for great stills and D-Movie HD videos Designed for use on Nikons FX-format D-SLR cameras, this updated medium telephoto f/1.8 lens is designed for shooting stills or D-Movie HD videos. The AF-S NIKKOR 85mm f/1.8G features Nikons Internal Focus (IF) system providing fast and quiet AF and produces sharp and clear images at all apertures. Its fast maximum aperture is perfect for taking stills or D-Movie HD videos under ideal lighting, in low light, head and shoulder portraiture, weddings or concerts. When mounted on a DX-format D-SLR, the AF-S NIKKOR 85mm f/1.8G AF-S has an effective field of view of 127mm.

Imagine being able to focus a lens without it changing in size. Nikon's IF technology enables just that. All internal optical movement is limited to the interior of the non-extending lens barrel. This allows for a more compact, lightweight construction as well as a closer focusing distance. A significant innovation in AF lens technology. Nikon's Silent Wave Motor uses ultrasonic (too quiet) vibrations rather than a gear system to focus the lens, providing extremely smooth, silent and precise auto focus operation. When fine manual focusing is needed, simply rotate the lens focus ring M/A mode allows you to seamlessly override the AF system with virtually no time lag. Nikon's Super Integrated Coating enhances light transmission efficiency and offers superior colour consistency and reduced lens flare.

In terms of features, the Nikon AF-S Nikkor 85mm f/1.8G offers almost all that you need from a prime lens. The lens has a built-in auto focus motor that allows AF operation on every Nikon DX camera body, including entry-level offerings like the D3100 or D5100. The lens also has a handy distance scale. The AF-S 85mm f/1.8 is lightweight, fast, and easy to tote around. Weighing in at 0.93 lb less than the venerable 85mm f/1.4 shooters that favours prime lenses can toss this optic in their gear bag without hesitation - it's small enough and light enough to take along everywhere!

Nikon 85mm Nikkor f1.8G AF-S Lens

Features:

Fast: f/1.8 Compact Prime Lens
Optimized for FX Format
Nikon F-Bayonet Mount
Silent Wave Motor with Internal Focus
M/A Focus Mode Switch
Nikon Super Integrated Coating

Specifications:

Focal Length: 85mm
Aperture: Maximum: f/1.8 - 1.8
Minimum: f/16 - 16
Camera Mount Type: Nikon F 1
Format Compatibility: Nikon FX/35mm Film, Nikon DX
Angle of View: 28°
DX Picture Angle: 18° 2
Minimum Focus Distance: 2.62' (0.8 m)
Groups/Elements: 9/9
Diaphragm Blades: 7
Auto focus: Yes
Filter Thread: 67mm
Dimensions (D x L): Approx. 3.1 x 3.0" (7.87 x 7.62 cm)
Weight: 0.93 lb (0.42 kg)

Kit Contents
Nikon 85mm Nikkor f1.8G AF-S Lens 
HB-62 Bayonet Lens Hood
LC-62 Snap-On Front Lens Cap
LF-4 Rear Lens Cap
CL-1015 Soft Case
Instruction / User Manual

About Nikon Lenses

Nikon is the only company in the world that manufactures their imaging products all the way from glass manufacturing to finished products. The spirit and technology to freely maneuver light are deeply embedded in Nikon's products. Nikkor is a lens brand for cameras that symbolizes the sprit of Nikon.
The design concept of Nikkor such as: "100 year quality" achieved through the fusion of traditional craftsmanship with the latest technology; lenses of such quality that they are considered works of art reflecting the unique craftsmanship of the master lens makers; High image quality unique to Nikon that is both sharp and expressive; Styling so beautiful it brings a joy of ownership without sacrificing usability.
The highly expected Nikon VR Lenses are professional-grade lenses that is specifically designed for portraits, studio and wedding photographers who need an ultra-fast, quality lenses with a large aperture for low-light circumstances. VR technology remove image blur caused by camera wobble, mainly when shooting in low-light conditions, permitting photographers to use shutter speeds up to three stops slower than they would normally use to obtain sharp, well exposed images.
Prime lenses, are smaller, lighter and more compact than zoom lenses and tend to be faster, offering wide apertures of f/2.8, f/1.8 or even f/1.4. The large apertures let in more light, which benefits the photographer in a number of ways.
Nikon Macro lenses ensure superior optical performance even at close distances that allows you to you take photographs that are 1:2 or 1:1 reproduction, which is ½ life size to life size respectively without the need for any additional accessories. It has both AF (Auto-focus) and MF (manual focus) mechanism. Nikon Macro lenses features IF "Internal Focusing" mechanism for quiet and smooth Auto Focus, yet the length of the Lens doesn't change during AF.
Nikon's Micro-NIKKOR lenses are designed to perform their best from infinity all the way down to their closest focusing distances. Moving in extremely close to the subject using a Micro-NIKKOR lens lets you to fill the entire frame with your subject, allowing you to expand your artistic vision.
Nikon Zoom lenses offers high-performance features in a solid body. Additionally they possess the shortest closest-focusing distance in its class - 0.33m throughout the entire zoom range. Nikon Zoom lenses are perfect for photojournalism and other all-purpose photographic needs.
These elements convey an "authentic ambience" to its owner, and are passed from yesterday to today, and from today to tomorrow, with the aim of bringing greater joy of visual expression to people who take photos.

For more information about, Nikon 85mm Nikkor F1.8G AF-S Lens website.