Canon 16-35mm f/4L IS EF

The 16-35 f/4L IS is our ultra-wide L-series zoom, sharper corners on full-frame than the f/2.8 II generation, 4-stop IS, weather sealed. The f/4 max aperture limits low-light work but earns sharpness across the frame at f/5.6-f/8 that's hard to match with a faster wide zoom. We rent it for interior wides, real estate, BTS, architectural and environmental coverage, and any setup where the priority is corner-to-corner detail rather than subject separation. EF mount, 77mm filter (same as the 24L II and 70-200), 615g. Important to know: at 16mm there's about 3-4% barrel distortion, significant for architectural work, easily corrected with lens profiles in any modern editor. Not parfocal, focus shifts during zoom. IS off on tripod or gimbal.