DESCRIPTION

This amazing aspherical lens can be your new "standard" in creativity. This new lens does the work of five — 18mm, 20mm, 24mm, 28mm and 35mm. A dual-function, high-resolution, floating group lens system incorporates an aspherical lens element. This eliminates the distortion common to ultra wides and improves close focus performance. Sigma's internal focus/zoom system keeps the lens at a constant size, even while zooming, for more comfortable handling. The front end of the lens doesn't rotate, improving stability and the use of filters and hoods. Ultra compact and extremely lightweight (less than 9.8 oz.). The exclusive ZEN finish prevents reflections and resists scratches. 5 year warranty!