Sigma 50mm f/1.4 EX DG HSM
Actual focal length is closer to 45 mm than 50 mm.
Good sharpness wide open, but it improves if you stop it down.
Features a 9 rounded blade diaphragm.
Made of polycarbonate and features a nice matte finish. It gives a solid feel with a large focus ring at the front of the lens. Auto-focus is fast and accurate, with instant manual override.
Comes with a plastic hood.
Rating: Ed: -, User: - (normalized, 0=useless, 50=average, 100=excellent).
Mounts: Canon EF, Four-Thirds, Nikon F, Pentax K, Sigma SD, Sony A.
Aperture range: f/1.4 to f/16.
Close focus distance (CFD): 45 cm / 1.48 ft (from sensor plane).
CFD magnification: 1:7.4 / 0.14X.
Focus: AF (built-in, ring-type).
Filter diameter: 77 mm.
L x D, W: 69 x 84 mm, 505 g.
Approximate street price: USD 499 (new, w/o tax).
Introduced: no data.
Sigma is a family owned manufacturer of photographic equipment founded in 1961 in Japan. The company's main business is to manufacture third party lenses. However they also produce third party flash units and, since 2002, their own line of DSLR and compact cameras. Sigma's digital cameras use a special sensor, developed by Foveon, that records full color information for every pixel. In late 2008 Sigma acquired Foveon.