L9) 50MM F1.4EX F/NIK DG HSM Lens
Designed for Nikon digital SLR cameras, the Sigma 50mm f/1.4 prime lens is ideal for a wide range of applications, from landscape photography to portraiture. The lens offers an extra-large aperture that guarantees superior peripheral brightness, helping create sharp images with high contrast even at the edges. The molded glass aspherical lens, meanwhile, perfectly corrects for coma aberration to ensure that images look sharp and crisp against a nicely blurred background. And thanks to the integrated Hyper Sonic Motor (HSM), the lens enjoys a silent, high-speed autofocus system. Other features include a super multilayer lens coating that reduces flare and ghosting, a minimum focusing distance of 17.7 inches, and a maximum magnification of 1:7.4. As with all Sigma lenses, this 50mm lens carries a one-year warranty.
Specifications

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
Corresponding AF mounts: Nikon
Dimensions: 3.3 inches in diameter and 2.7 inches long
Weight: 17.8 ounces
Warranty: 1 year