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Sigma 500mm f/4.5 EX DG (Pentax AF)
This ultra-telephoto lens has a fast maximum aperture, and also features a new super multi-layer coating, which optimizes the characteristics of digital SLR cameras. Two ELD glass elements in the front lens elements reduce chromatic aberration to a minimum and also ensure sharp, quality images of high contrast.Coating reduces Ghost and FlareThe multi-layer lens coating and lens design reduce flare and ghost, which is a common problem with...more
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