(From Sigma lens literature) The Sigma Corporation is pleased to announce the new Sigma 10-20mm ƒ/3.5 EX DC HSM. This super-wide angle lens has a maximum aperture of ƒ/3.5 throughout the entire zoon range. Its wide angle of view from 102.4 degrees produces striking images with exaggerated perspective.
The maximum aperture of ƒ/3.5 is ideal for indoor shooting and it enables photographers to emphasize the subject. Two ELD (Extraordinary Low Dispersion) glass elements and a SLD (Special Low Dispersion) glass element provide excellent correction of color aberration. Four aspherical lenses provide correction for distortion and allow compact and lightweight construction.
The Super Multi-Layer coating reduces flare and ghosting. High image quality is assured throughout the entire zoom range.The incorporation of HSM (Hyper Sonic Motor) ensures a quiet and high-speed AF as well as full-time manual focusing capability.
This lens has a minimum focusing distance of 24cm (9.4 inches) throughout the entire zoom range and a maximum magnification ratio of 1:6.6. The lens design incorporates an inner focusing system. It eliminates front lens rotation, making the lens particularly suitable for using the Petal-type hood. The Petal-type hood blocks extraneous light and reduce internal reflection.
