The AF-S DX Zoom-Nikkor 17-55mm f/2.8G IF-ED is another high-quality zoom lens option customized for digital cameras, part of the new DX Nikkor series. Designed
specifically for use with Nikon D1/D2-series and D100 digital SLR cameras, it
features wideangle zoom capability, ED (Extra-low Dispersion) glass and Nikon's
exclusive built-in SWM (Silent Wave Motor).

The lens is targeted at professional and advanced amateur Nikon D-SLR users who
demand both the advantages of high optical performance and wideangle focal zoom range.

This G-type Nikkor lens is designed with no aperture rings, and offers easier, virtually
mistake-free operation because the aperture does not need to be set to minimum.
Equivalent focal length in 35mm is 25.5-85.5mm.
Key Features
• Fast, ultra-wideangle zoom lens with Silent Wave Motor
• Three ED (Extra-low Dispersion) glass elements minimize chromatic aberration, provide higher resolution and superior contrast
• Three aspherical lens elements minimize distortion, especially at the periphery, for superior optical performance
• "SWM" (Silent Wave Motor) for swift autofocusing with superior accuracy and ultra-quiet operation
• The rounded diaphragm opening (7 blades) makes out-of-focus elements appear more natural
• M/A mode allows rapid switching between autofocus and manual even during AF servo operation, with virtually no time lag
• Internal Focusing (IF) design for smoother focusing and great body balance

The pro-quality, mid-range zoom in Nikon's DX series of lenses, intended to bring back the
28-80mm* angle of view for digital bodies with 1.5x angle of view conversion.
14 elements in 10 groups; 3 aspheric, and 3 ED elements
Manual focus override, AF-S lens focusing motor, internal focus, 77mm filter size. Comes with HB-31 hood. Focuses to 1.2' (0.36m).
About 110mm long, 26.6 ounces (755g)

Review: http://www.bythom.com/1755lens.htm