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High performance lens optimized for use with digital SLR camerasCapable of macro photography this lens has a 1:2 maximum close-up magnification at the 300 mm focal length. It's the ideal lens for portraits sports photography nature photography and other types of photography that frequently use the telephoto range. It also has a switch for changeover to macro photography at focal lengths between 200mm and 300mm with a maximum close-up magnification from 1:2.9 to 1:2.SLD (Special Low Dispersion) glass in this lens provides excellent correction of chromatic aberration. Coating reduces Ghost and FlareThe multi-layer lens coating and lens design reduce flare and ghost which is a common problem with digital cameras and also creates an optimum colour balance through the entire zoom range.SLD (Special Low Dispersion) glassSLD (Special Low Dispersion) glass is used in this lens for correction of chromatic aberration. This also corrects for fluctuation of aberration due to focusing. High optical performance i (More)
EX series large aperture zoom lens designed specially for use with digital SLR cameras with a minimum focusing distance of 20cm.The Sigma Corporation is pleased to announce the launch of the new 18-50mm F2.8 EX DC MACRO lens.This lens has a large aperture of F2.8 throughout the entire zoom range, a minimum focusing distance of 20cm (7.9») and a maximum magnification of 1:3, making it ideal for close-up photography.Specially designed to suit the characteristics of digital SLR cameras this lens provides a high level of optical performance.Its design incorporates both glass-mold and hybrid aspherical lens technology which offers superior peripheral brightness, extremely high image quality as well as a compact and lightweight construction.Special Low Dispersion (SLD) and Extraordinary Low Dispersion (ELD) glass elements provide excellent correction of color aberrations. The super multi-layer lens coating reduces flare and ghosting, a common problem with digital cameras. High image quality is assured (More)