AF28-75mm F/2.8 XR Di LD Aspherical (IF) |
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Digitally Integrated Design, is a designation Tamron puts on lenses featuring optical systems designed to meet the performance characteristics of digital SLR cameras. The most compact and lightest in the history of fast zoom lenses. Thanks to the revolutionary downsizing "XR" technology employed by Tamron in the development of high-power zoom lenses such as the 28-200mm and 28-300mm, the dramatic compactness that makes this lens the world's smallest and lightest is achieved. Its compactness makes it look and feel like an ordinary standard zoom lens, yet the versatility that a fast constant maximum aperture offers will definitely reshape your photographic horizons. The Tamron SP AF28-75/2.8 XR Di LD Aspherical (IF) Macro is a fast, general purpose lens for both digital and film cameras. On a film camera the 28-70mm range covers a lot of applications from landscapes and photojournalism to travel and environmental portraits. On a typical APS-C digital camera, such as the Canon EOS 20D or the Canon Rebel XT, it has the same field of view as a 45-120mm lens would on a full frame 35mm camera. This range also has a number of "typical applications" but perhaps of most interest is that it covers the "portrait" range, which traditionally has been from about 80mm to 105mm. Of course you can take portraits with anything from a wideangle to a telephoto, but most portraiture is done with short telephotos (80-105mm). A fast (f2.8) lens also lends itself to portraiture, where a smaller DOF gives a more diffuse background. The Tamron SP AF28-75/2.8 XR Di LD Aspherical (IF) Macro is a Tamron "Di" lens. Di lenses designed with digital SLRs in mind and Tamron say that they have higher resolution, better control of flare and ghosting, less light fall-off and lower chromatic aberration than earlier designs. === read more, attribute to www.photo.net ===
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