Sigma 10-20mm f/3.5 EX DC HSM Lens for Canon EF

The Sigma 10-20mm f/3.5 EX DC HSM is an APS-C ultra-wide zoom lens built for Canon’s EF mount DSLR system and part of Sigma’s EX series, representing Sigma’s higher tier of optical and mechanical standards at the time of its production. Covering a focal range equivalent to approximately 16-32mm in full-frame terms with a constant f/3.5 maximum aperture throughout, it delivers a broad ultra-wide angle of coverage well suited to landscape, architecture, interior, and environmental photography where maximum scene width and a consistent aperture across the zoom range are desired. The constant f/3.5 aperture provides a practical advantage over variable aperture ultra-wide zooms, maintaining consistent exposure settings as the focal length is adjusted. The HSM ultrasonic motor delivers fast, quiet, and responsive autofocus performance without requiring a body-side focus motor, and the robust EX series construction reflects Sigma’s emphasis on build quality and optical performance.

– 10-20mm ultra-wide focal range, equivalent to approximately 16-32mm full-frame
– Constant f/3.5 maximum aperture throughout zoom range
– Sigma EX series optical and mechanical standards
– HSM ultrasonic motor autofocus — no body-side motor required
– Quiet focus operation suitable for video use
– Robust EX series construction
– Canon EF mount compatibility
– APS-C DX format coverage