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Sigma 500mm F4.5 EX APO DG HSM Lens :
Fast maximum aperture F4.5 telephoto lens optimized for digital SLR cameras. 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. New coating reduces Ghost and Flare The new multi layer lens coating and lens design reduce flare and ghost, which is a common problem with digital cameras and also creates an optimum color balance. It is equipped with ELD (Extra Low Dispersion) glass elements Two ELD glass elements in the front lens elements reduce chromatic aberration to a minimum and also ensure sharp, quality images of high contrast. It also features a rotatable drop-in filter It also features a drop-in 46mm filter holder in the rear part of the lens barrel, which can be rotated to facilitate the use of filters, including a polarizing filter. HSM (Hyper Sonic Motor for Sigma, Canon and Nikon mount lenses) The AF drive for Sigma SA, Canon and Nikon S.L.R. cameras features Sigma’s ultra-quiet and high-speed Hyper Sonic Motor (HSM). Inner Focus Inner focusing retains external dimensions for ease of handling. Accepts both 1.4X and 2X APO EX Tele-Converters. By adding an APO teleconverter (optional extra), you can use this lens as a 700mm F6.3 MF ultra-telephoto lens with a 1.4X EX teleconverter, or as a 1000mm F9 MF ultra-telephoto lens with a 2X teleconverter. Specifications:
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