Sigma Corporation manufacture cameras, lenses, flashes and other photographic accessories.
As well as making lenses to fit their own cameras, Sigma lenses are made to fit the interchangeable lens cameras of the leading camera manufacturers, usually Canon, Nikon, and Pentax but sometimes others.
Sigma lenses are usually cheaper than the equivalent offering from the manufacturer of the camera body in question, so are therefore often sold bundled with a camera body as a cheaper alternative to the manufacturer's body and lens kit.
Sigma's digital SLRs, the SD9 and SD10, are unusual in their use of the Foveon X3 image sensor.
External links
