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Sigma 50mm f/1.4 EX DG HSM Autofocus Lens
MFR# 310101, 310306, 310205, 310109

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TheĀ Sigma 50mm f/1.4 EX DG HSM Autofocus LensĀ is a standard lens that provides a large maximum aperture of f/1.4. It is the ideal prime lens for use with all digital or film SLR cameras. When used on digital SLR cameras with the APS-C size sensor, the equivalent focal length of this lens will be 75mm, which makes it an excellent choice as a bright short telephoto lens. Its large f/1.4 aperture allows for sharply defined contrasty images against a nicely blurred background. The lens offers superior peripheral brightness even at the maximum aperture, and corrects for possible flare.

The improved DG lens design corrects for various aberrations. This lens is specially coated to get the best color balance, while cutting down on ghosting caused by reflections from the digital image sensor. The lens provides the utmost correction against lateral chromatic aberration, which is a serious problem for digital SLR cameras.

This lens also incorporates HSM (Hyper Sonic Motor), which ensures a quiet and high-speed AF as well as full-time manual focus override


* Focal length: 50mm
* Maximum aperture: f/1.4
* Lens construction: 8 elements in 6 groups
* Angle of view: 46.8 degrees
* Number of diaphragm blades: 9
* Minimum aperture: f/16
* Minimum focusing distance: 17.7 inches
* Maximum magnification: 1:7.4
* Filter size: 77mm