Long zoom, fast 50mm prime from Sigma

Sigma has announced a lightweight version of its popular 18-200mm f3.5-6.3 zoom lens along with a new premium 50mm f1.4 prime lens.

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The 18-200mm F3.5-6.3 DC Macro OS HSM Contemporary lens is designed for APS-C DSLRs and replaces the 18-200mm F3.5-6.3 II DC OS HSM, launched in 2011. The smaller and lighter lens weighs only 430 grams and measures 86mm. It features 16 elements in 13 groups, with Special Low Dispersion (SLD) glass elements to correct chromatic aberration at the telephoto end along with aspherical lens elements, including double-sided aspherical lenses, to ensure a compact size and excellent correction of distortion.

Minimum focusing distance has been reduced to 39cm, with a maximum magnification of 0.33x, enabling the lens to be used for close-up shooting with natural light. It accepts 62mm diameter filters and is supplied with a petal-shaped lens hood.

sigma_50mm-f14_art_smlThe new wide-aperture Sigma 50mm F1.4 DG HSM Art lens has been re-engineered and redesigned ‘to set a new standard of performance in the Art line’. Manufactured from metals and a new TSC (Thermally Stable Composite) it features a durable brass bayonet mount. The lens is made for full frame DSLRs, delivering the ‘all-purpose’ 50mm focal length for a range of photography including portraits, landscapes, studio work and still-life.

It has been updated to include SLD glass and optimised for improved large aperture performance by positioning wide elements into the front groups.

Other updates include an optimised autofocus algorithm for smoother focusing and a floating focusing system to reduce lens movement while focusing. The new lens features a matte finish, and improved AF on/off switch. Sigma guarantees every lens is tested with Sigma’s proprietary modulation transfer function (MTF) ‘A1’ measuring system before being shipped.

Now with 13 elements in 8 groups compared to the previous 8 elements in 6 groups, it also has improved close focusing at 40cm and a maximum magnification ratio of 0.18x. Both lenses incorporate Sigma’s Hyper Sonic Motor (HSM) system to produce quiet, high-speed autofocus. In addition, they include Super Multi-Layer Coating to reduce flare and ghosting, and to ensure high-quality images throughout the entire zoom range. Local distributor CR Kennedy will have local release dates and pricing details available this month.


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