Sigma 18-35mm f/1.8 DC HSM Art Lens for Canon EF

The Sigma 18-35mm f/1.8 DC HSM Art is an APS-C standard zoom lens built for Canon’s EF mount DSLR system and part of Sigma’s Art series, representing the company’s highest tier of optical and mechanical standards. Covering a focal range from 18mm to 35mm with a constant f/1.8 maximum aperture maintained throughout the entire zoom range, it occupies a unique position in the lens market as one of the very few zoom lenses available with a constant f/1.8 aperture — a specification more commonly associated with fixed focal length prime lenses. This exceptionally large maximum aperture for a zoom lens provides a significant light gathering advantage over conventional constant f/2.8 standard zooms, allowing for cleaner high-ISO performance in lower light conditions and considerably more pronounced background separation and depth of field control across the zoom range.

The lens was designed from the ground up with an emphasis on resolving power and contrast wide open, areas where many fast zoom lenses traditionally struggle. Sigma’s Art series optical formula incorporates a range of special elements to control aberrations, field curvature, and distortion across the zoom range and at wider apertures, delivering a level of optical performance that competes directly with high-quality prime lenses. The HSM ultrasonic motor provides fast, quiet, and responsive autofocus performance well suited to both stills and video applications, and full-time manual focus override allows direct focus adjustment without disengaging autofocus. The robust physical construction features brass bayonet mount components and a high-quality exterior finish consistent with the Art series standard, and the lens barrel incorporates a zoom lock switch to prevent unwanted barrel extension during transport.

– 18-35mm focal range with APS-C coverage
– Constant f/1.8 maximum aperture throughout entire zoom range
– One of the few zoom lenses available with constant f/1.8 aperture
– Sigma Art series optical and mechanical standards
– Designed for high resolving power and contrast wide open
– Special optical elements for aberration, field curvature, and distortion control
– HSM ultrasonic motor autofocus system — no body-side motor required
– Full-time manual focus override
– Quiet focus operation suitable for video use
– Brass bayonet mount construction
– Zoom lock switch for transport
– Robust Art series physical construction
– Canon EF mount compatibility
– APS-C DX format coverage