Compared to the previous version, the new lens is smaller and lighter with a reduced filter size of 62 mm and rounded diaphragm blades for an improved background blur. It also incorporates an “F” Low Dispersion (FLD) glass element, which offers performance equal to fluorite glass, according to Sigma, and two Special Low Dispersion (SLD) glass elements to ensure excellent correction of colour aberration.
The new lens incorporates aspherical lens elements to provide excellent correction for all types of aberration and distortion.
Super Multi-Layer Coating reduces flare and ghosting, ensuring high quality images throughout the entire zoom range.
Sigma’s Optical Stabilizer (OS) system offers effective correction of up to four stops, for handheld photography at slower shutter speeds.
The HyperSonic Motor (HSM) ensures quiet, high-speed autofocus, while the inner focus system eliminates front lens rotation, allowing the use of circular polarizing filters and the supplied petal-type lens hood.
The lens will be available in Canon, Nikon, Pentax, Sony, and Sigma mounts.
Suggested retail price of the Sigma 18-200 mm f/3.5-6.3 II DC OS HSM is $569.95.