To be offered with mounts for Sigma, Canon, Nikon, Pentax and Sony interchangeable-lens DSLRs, the new lens has an effective focal length (in 35mm format) of 80mm on a camera with a 1.
 March 18, 2008: Sigma will add a new large-aperture 50mm f/1.4 prime lens to its product line-up some time this year. This is the fastest 50mm prime lens in the Sigma catalogue is an excellent general-purpose lens. To be offered with mounts for Sigma, Canon, Nikon, Pentaxand Sony interchangeable-lens DSLRs, the new lens has an effective focal length (in 35mm format) of 80mm on a camera with a 1.5x focal length crop factor. Its optical design includes moulded glass aspherical lens elements to provide excellent correction for all types of aberrations plus a Hyper Sonic Motor (HSM) to ensure silent, high-speed autofocusing. (If the camera body does not support HSM, autofocus will not be available.) Full-time manual focus override is provided. Sigma claims this lens will provide superior peripheral brightness and provide sharp, high contrast images even at the maximum aperture. Superior optical performance is also ensured throughout the focusing range. The super multi-layer lens coating reduces flare and ghosting. This lens has a minimum focusing distance of 45cm and maximum magnification of 1:7.4. The iris diaphragm creates a very attractive blur, even when a small aperture is used. For more information, visit www.sigma-photo.co.jp/english.
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