Canon EF 20-35mm f/3.5-4.5 USM Lens

The Canon EF 20-35mm f/3.5-4.5 USM is a full-frame wide-angle zoom lens built for Canon’s EF mount DSLR and film SLR system. Covering a focal range from 20mm to 35mm with a variable maximum aperture, it addresses wide-angle applications including landscape, architecture, interior, and environmental photography where a broad field of view is desired. The variable maximum aperture runs from f/3.5 at the wide end to f/4.5 at full extension, and the USM ultrasonic motor delivers fast, quiet, and responsive autofocus performance suitable for both stills and video use, with full-time manual focus override allowing direct focus adjustment without disengaging autofocus. The wider starting focal length of 20mm provides generous scene coverage suited to interior and architectural work where space constraints limit working distance.

– 20-35mm wide-angle zoom focal range
– Variable f/3.5-4.5 maximum aperture
– USM ultrasonic motor autofocus system
– Full-time manual focus override
– Wide 20mm starting focal length for broad scene coverage
– Quiet focus operation suitable for video use
– Canon EF mount compatibility
– Full-frame and APS-C format coverage
– Suitable for landscape, architecture, and interior photography