The Sigma 50-500mm 4-6.3 EX DG HSM is a super-telephoto zoom lens produced by Sigma Corporation. It contains four SLD (Special Low Dispersion) glass elements to provide correction for chromatic aberration. It is aimed at advanced consumers.
Versions The lens was originally announced by Sigma in 2000 at that year's Photo Expo and released in 2001. The lens has a variable minimum focusing distance and varifocal design, which was remedied partially through autofocusing technology.
Over the years, it has gone through several iterations and improvements. This includes the 2006 DG model which has upgraded coatings optimized for digital cameras. In 2010, Sigma added built-in optical stabilization (OS) to the lens. AF 50-500mm F4-6.3 EX APO RF HSM(2001) APO 50-500mm F4-6.3 EX DG HSM(2006) 50-500mm F4.5-6.3 APO DG OS HSM(2010) Focal length 50~500 mm Aperture ~6.3[to ~36] ~6.3 Construction 20e/16g (4 SLD) 22e/16g Min. focus dist. [for f=50, 500 mm] Max. mag. 1:5.2 (at f=200 mm) 1:3.1 Filter (mm) 86 95 Dims. (Φ×L) Wgt. Mounts Sigma SA, Minolta α, Pentax K(AF), Nikon (AF-D), Canon EF Sigma SA, Minolta α, Pentax K(AF), Nikon (AF-D), Canon EF, 4/3 Sigma SA, Minolta α, Pentax K(AF), Nikon (AF-D), Canon EF
See also List of Nikon F-mount lenses with integrated autofocus motors Sigma 60-600mm f/4.5-6.3 DG OS HSM lens Sigma 200–500mm f/2.8 EX DG lens Sigma 300–800mm f/5.6 EX DG HSM lens (a.k.a. the Sigmonster)
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