Sigma Corporation Press Release 27/10/03

Compact - Lightweight zoom lenses designed to suit the characteristics of digital cameras

18-50mm F3.5-5.6 DC
Sigma Corporation is pleased to announce the launch of the new 18-50mm F3.5-5.6 DC. This zoom lens was exclusively designed to suit the characteristics of digital SLR cameras. The image circle was designed to match the size of the image sensors of digital SLR cameras, and this produced a compact lens with a maximum diameter of 60mm (2.3in.), overall length of 67.5mm (2.6in.) and weight of only 245gr (8.6 ounces). It has a variable angle of view of 76.5degree-31.7degree. The use of aspherical lenses provides correction for various aberrations throughout the entire zoom range and produce high level of optical performance. 18-50mm F3.5-5.6 DC lens has a minimum focusing distance of 25cm (9.8in.) at all focal lengths and is capable of macro photography with a maximum magnification ratio of 1:3.5.

50-200mm F4-5.6 DC
Sigma Corporation is pleased to announce the launch of the new 55-200mm F4-5.6 DC. This compact telephoto zoom lens was exclusively designed for use with digital SLR cameras. The image circle was designed to match the size of the image sensors of digital SLR cameras that also allows compact body and lightweight with overall length of 84.6mm (3.3in.), and weight of only 310g/10.9 ounces. It has a filter size of 55mm, maximum diameter of 70mm (2.7in.). This remarkably compact high performance zoom lens is ideally suited to a wide range of subjects. This lens has a minimum focusing distance of 110cm (43.3in.) and maximum magnification of 1:4.

*They cannot be used in SA-7 and SA-9 35mm film SLR cameras. Combination with these cameras may cause vignetting on the picture surface.

*If SD9 or SD10 digital cameras are used, the angle of view will be equal to 30-85mm focal length. The angle of view varies depending on the camera.

Specifications

18-50mm F3.5-5.6 DC
*Focal Length : 18-50mm*Minimum Aperture : F22*Lens Construction : 8 Elements in 8 Groups*Angle of View : 76.5degree-31.7degree*Number of Diaphragm Blades : 7pcs*Minimum Focusing Distance : 25cm (9.8in.) *Maximum Magnification : 1:3.5*Filter Size : 58mm*Lens Hood : Bayonet Hood*Dimensions : Diameter 67.5mm (2.6in.)X Length *60mm (2.3in.)*Mounts (AF) : Sigma, Canon, Nikon (D), Pentax*Weight : 245gr/8.6ounces

55-200mm F4-5.6 DC
*Focal Length : 55-200mm*Minimum Aperture : F22*Lens Construction : 10 Elements in 9 Groups*Angle of View : 29.0degree-8.1degree*Number of Diaphragm Blades : 8pcs*Minimum Focusing Distance : 110cm (43.3in.) *Maximum Magnification : 1:4.5*Filter Size : 55mm
*Lens Hood : Bayonet Hood*Dimensions : Diameter 70mm (2.7in.)X Length *84.6mm (3.3in.)*Mounts (AF) : Sigma, Canon, Nikon (D), Pentax*Weight : 310gr/10.9ounces