The gadget incorporates the digital data necessary to provide fast and smooth Af for compatible lenses as well as Os features and functions of the camera that help control peripheral brightness, correct transverse chromatic aberration and distortion....
Tapping into Sigma's long history of lens innovations, the 18-35mm 1.8 Dc Hsm incorporates a wide glass molded aspherical lens with Special Low Dispersion (Sld) glass to compensate for aberrations and curvature at the widest angle....
With ultra-sharp optics, a bright F2.8 aperture, and a newly developed push-on petal type lens hood, photographers can create expressive images anytime, anywhere....
A constant aperture of 2.8 through the zoom range makes this a highly versatile tool and a brand new Optical Stabilization (Os) system helps compensate for camera shake....
A constant aperture of 2.8 through the zoom range makes this a highly versatile tool and a brand new Optical Stabilization (Os) system helps compensate for camera shake....
With ultra-sharp optics, a bright F2.8 aperture, and a newly developed push-on petal type lens hood, photographers can create expressive images anytime, anywhere....
Combining high-speed Af, remarkably effective Os, exceptional mechanical reliability, and superior optical performance, this high-performance lens is purpose-built to meet the rigorous demands of professional-level photographers....