Sigma is a Japanese optical company founded in 1961 that specialises in the manufacture of cameras, lenses, flashes, and other accessories for photography. The family-owned business grew to become one of the largest independent lens manufacturers in the world. Though the company produces many of its own camera models, its most popular products are those that are compatible with other photographic equipment.
Sigma lenses and accessories are compatible with Canon, Nikon, Kodak, Pentax, and other well-known camera companies. In addition to standard lenses, the company offers a number of wide-angle, telephoto, and macro lenses. Their products are available for many types of cameras, including vintage SLRs as well as digital SLRs. Sigma's compact digital cameras are easy to use for photographers on all levels.