Sigma 50mm F1.4 DG HSM Art
Sigma’s 18-200mm F3.5-6.3 DC Macro OS HSM Contemporary lens, designed specifically for APS-C DSLRs, is the successor to the 18-200mm F3.5-6.3 II DC OS HSM. The smaller and lighter lens offers macro capabilities with a minimum focusing distance of 15.4 inches and a maximum magnification ratio of 1:3. It incorporates Special Low Dispersion (SLD) glass elements that have a high refractive index and can correct chromatic aberration at the telephoto- end. Aspherical lens elements will ensure a compact size and excellent correction of distortion. The Sigma 50mm F1.4 DG HSM Art is a pro level performer for full-frame DSLRs and includes an optimized autofocus algorithm for smoother focusing and a floating focusing system to reduce lens movement. It features a new matte finish, improved AF on/off switch and has close focusing at 15.7 inches and a maximum magnification ratio of 1:5.6. Both lenses incorporate Sigma’s Hyper Sonic Motor (HSM) system to produce quiet, high-speed auto focus. They include Super Multi-Layer Coating to reduce flare and ghosting, and to ensure high-quality images throughout the entire zoom range. Further information at www.sigmaphoto.com.