Sigma 18-50mm lens
PMA 2010 Report
Sigma Corporation is pleased to announce the new Sigma 18-50mm F2.8-4.5 DC OS HSM lens. This large aperture standard zoom lens incorporates Sigmas original Optical Stabilisation function. This lens offers a large aperture of F2.8 at 18mm wide angle. This large aperture and anti-shale function is ideal for indoor photography and in low lighting condition. For Sony and Pentax mount, the built-in OS function of this lens can be used even if the camera body is equipped with an anti-shake function. As compensation for camera shake is visible in the view finder, the photographer can easily check for accurate focus and ensure there is no subject movement.
Sigma 18-50mm F2.8-4.5 DC OS HSM lens
Two SLD (Special Low Dispersion) glass elements and three aspherical lenses provide excellent correction for all types of aberrations. Furthermore, the Sigma 18-50mm lens has a Super Multi-Layer Coating, to reduce flare and ghosting. High image quality is assured throughout the entire zoom range. The Sigma lens design incorporates inner focusing and inner zooming systems. The overall length of the 18-50mm lens does not change during focusing and zooming, ensuring convenient handling. The Sigma 18-50mm lens has a minimum focusing distance of 30cm (11.8 inches) throughout the entire zoom range and a maximum magnification ratio of 1:4.1. The incorporation of HSM (Hyper Sonic Motor) ensures a quiet and high speed AF.
Sigma 18-50mm lens specifications
Lens construction : 16 elements, 12 groups
Angle of view : 69.3°-27.9°
Number of blades : 7pcs
Minimum Aperture : F22
Minimum Focusing Distance : 30cm / 11.8in
Maximum Magnification : 1:4.1
Filter Size : Φ 67mm
Lens Hood : Petal-type hood
Dimensions : Φ 74mm × 88.6mm / 2.9" × 3.5"
Weight : 395g / 13.9oz