Sigma 18-35mm F1.8 DC HSM Art
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The Sigma 18-35mm F1.8 DC HSM Art lens is the world's first constant F1.8 zoom. Designed specifically for SLRs with APS-C sized sensors, it covers a 28-50mm equivalent range, and is initially available in Canon, Nikon and Sigma mounts with Sony and Pentax versions to follow. The 18-35mm offers the depth-of-field equivalent of a constant F2.7 on full-frame, and allows the use of lower ISO settings in low light. The lens uses Sigma's Hypersonic Motor for fast, silent focusing, and is compatible with the Sigma USB dock for fine-tuning autofocus calibration. Optically it's one of the finest zooms we've seen.
|Lens type||Zoom lens|
|Focal length||18–35 mm|
|Lens mount||Canon EF-S, Nikon F (DX), Pentax KAF, Sigma SA Bayonet, Sony/Minolta Alpha DT|
|Min focus||0.28 m (11.02″)|
|Weight||810 g (1.79 lb)|
|Length||121 mm (4.76″)|
The Sigma 18-35mm F1.8 DC HSM is an extraordinary lens, offering prime-level image quality in the fastest zoom ever made for SLRs. Its 28-50mm equivalent range is a little limiting though, and inconsistent autofocus means that it can be difficult to make the most of the excellent optics when shooting at large apertures.
Good for: Enthusiast APS-C users looking for the very best image quality available from a normal zoom, and willing to spend a bit of time setting up autofocus micro-adjustments or using live view focusing for the sharpest results.
Not so good for: Photographers who like to travel light, or need a wide-ranging zoom.
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