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Nikon AF-S DX NIKKOR 17-55mm f/2.8G IF-ED Zoom Lens with Auto Focus for Nikon DSLR Cameras
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Nikon AF-S DX NIKKOR 17-55mm f/2.8G IF-ED Zoom Lens Features
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Constant f2.8 3.2x zoom lens developed exclusively for use with Nikon DX Format, optimized for Nikon digital SLRs
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Dust and waterproof rubber sealing mount. Focal length : 17-55mm. Maximum Reproduction Ratio : 0.20x
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High optical performance by aspherical lenses and ED glass elements
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Silent Wave Motor enables ultra-high-speed autofocusing with exceptional accuracy and powerful super-quiet operation
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M/A mode for quick switching between autofocus and manual operation
About Nikon AF-S DX NIKKOR 17-55mm F/2.8G IF-ED Zoom Lens
From the Manufacturer Lens-making is an art--Nikon artisans craft Nikkor optics from the finest materials, taking pride in adding their intellect and technique to bring the world's finest lenses to life. They push the leading edge of lens-making in their effort to provide the "glass" that makes the world's greatest pictures. The Nikon 17-55mm f2.8G ED-IF AF-S DX is the world's first constant f2.8 3.2x zoom lens developed exclusively for use with Nikon DX Format. The 3.2x zoom covers from a wide angle of 79 degrees to a narrow angle of 28 degrees 50 minutes (equivalent to 25.5mm to 85.5mm for 35mm format) and is ideal for architecture, landscape, groups shots and portraits. DX design enables a combination of wider angle-of-view with optical characteristics that are optimized for Nikon digital SLR camera sensors. Nikon DX design produces a smaller image circle (the size of the image that is projected by the lens on to the sensor) enabling smaller lens diameter, lighter weight, and optimal image quality from center-to edge-to-corner on the image. Three Extra-Low Dispersion (ED) glass elements minimize chromatic aberration and provide higher resolution and superior contrast. Three aspherical lens elements minimize distortion in a lightweight and compact design similar to 17-35mm f2.8 lens. The exclusive Silent Wave Motor enables ultra-high-speed autofocusing with exceptional accuracy and powerful super-quiet operation. [M/A] and [M] modes allow rapid switching between AF and MF operation. Internal Focusing design for smoother focusing and great body balance. Nikon D-type design provides precise distance information for flash and ambient light exposure processes. The rounded diaphragm makes out-of-focus elements appear more natural. The G Type DX Nikkor is designed exclusively for use with Nikon Digital SLR models. ED glass: An essential element of Nikkor telephoto lenses Nikon developed ED (Extra-low Dispersion) glass to enable the production of lenses that offer superior sharpness and color correction by minimizing chromatic aberration. Put simply, chromatic aberration is a type of image and color dispersion that occurs when light rays of varying wavelengths pass through optical glass. In the past, correcting this problem for telephoto lenses required special optical elements that offer anomalous dispersion characteristics--specifically calcium fluoride crystals. However, fluorite easily cracks and is sensitive to temperature changes that can adversely affect focusing by altering the lens' refractive index. So Nikon designers and engineers put their heads together and came up with ED glass, which offers all the benefits and none of the drawbacks of calcium fluorite-based glass. With this innovation, Nikon developed several types of ED glass suitable for various lenses. They deliver stunning sharpness and contrast even at their largest apertures. In this way, Nikkor's ED-series lenses exemplify Nikon's preeminence in lens innovation and performance. Nikon Super Integrated Coating ensures exceptional performance To enhance the performance of its optical lens elements, Nikon employs an exclusive multilayer lens coating that helps reduce ghost and flare to a negligible level. Nikon Super Integrated Coating achieves a number of objectives, including minimized reflection in the wider wavelength range and superior color balance and reproduction. Nikon Super Integrated Coating is especially effective for lenses with a large number of elements, like our Zoom-Nikkors. Also, Nikon's multilayer coating process is tailored to the design of each particular lens. The number of coatings applied to each lens element is carefully calculated to match the lens type and glass used, and also to assure the uniform color balance that characterizes Nikkor lenses. This results in lenses that meet much higher standards than the rest of the industry. Aspherical lens elements Nikon introduced the first photographic lens with aspherical lens elements in
