The Nikon AF-DX 17-55mm f/2.8 g and is a standard zoom compatible with all APS-C format reflex. It is a lens designed and made to ensure maximum quality to digital SLR. As with most Nikon lenses, it does not present the image stabilization function which is instead foreseen in the cameras themselves. This lens model has a motorized focus with Ring-Usm, an ultra-soup engine. The Nikon AF-DX 17-55mm f/2.8 g lente and can be considered a professional product , capable of ensuring a series of combinations of technical factors that guarantee high resolutions and an excellent contrast in the images . The focal length is 17-55 millimeters while the corner of the field varies between 29.3 and 80.5 °, values ​​equivalent to a 26-83 millimeters of the FF 24x36 formats. The quality of the image is guaranteed by the three lenses made in glass and which allow to minimize chromatic aberrations and, at the same time, to guarantee an excellent contrast of image. The lens also arises as an ideal solution for the digital reflex of the Nikon, i.e. the right and, in particular, the D1, D100 and D2H series. For these camera models, zoom can be used as a standard optics. The focus is fast and automatic: this lens in fact presents a particular and proprietary ultrasound motorized technology, namely the Nikon Silent Wave Motor (SWM). This allows you to quickly find the fire of objects and static and moving subjects ensuring maximum silence. To conclude, it is emphasized that the Nikon AF-S 17-55mm f/2.8 g and is a practical and handy lens, with dimensions of 86x111 mm and a weight of 755 grams.