Canon EF 17-40mm f/4L USM Lens

The Canon 8806A002 is a professional L-series zoom lens that covers 17 to 40 millimeters on full-frame EOS cameras, delivering a true wide-angle view with a constant maximum aperture of f/4. Photographers can move from sweeping landscapes to tight interior spaces without worrying about exposure shifts while zooming.

Inside the barrel, one Super Ultra Low Dispersion element works with three aspherical elements to suppress color fringing and distortion. A Super Spectra coating further boosts contrast by reducing flare and ghosting, so backlit cityscapes and sunset horizons retain rich detail and accurate color.

An Ultrasonic Motor drives autofocus that is both quick and nearly silent, a real advantage for candid street shots or video recording. Full-time manual focus is always available, letting you fine-tune focus the moment inspiration strikes without flipping any switches.

The lens weighs roughly 1.1 pounds and measures under four inches long, so it slips easily into a travel kit. Weather sealing around the mount and critical joints shields the optics from dust and light rain, making the lens reliable on coastal shoots, mountain trails, or busy event venues. A 77 mm front filter thread accommodates common polarizers and neutral density filters, while a rear gel filter slot offers additional creative options.

Landscape and architectural specialists value the expansive field of view, and wedding or event photographers rely on the zoom range for group portraits in tight indoor settings. Mounted on an APS-C body, the lens behaves like a 27 to 64 millimeter standard zoom, turning it into a versatile everyday option for travel and street storytelling.

• 17 to 40 mm focal range covers landscapes, interiors, and group portraits
• Constant f/4 aperture keeps exposure consistent across the zoom range
• Designed for full-frame Canon EF-mount DSLRs and compatible with APS-C bodies
• One Super Ultra Low Dispersion element and three aspherical elements improve sharpness and color accuracy
• Super Spectra coating reduces flare and ghosting in challenging light
• Ultrasonic Motor provides autofocus that is fast and quiet
• Full-time manual focus lets you adjust focus instantly without mode changes
• Weather-sealed construction protects against dust and light moisture
• Front 77 mm filter thread and rear gel filter holder expand creative control
• Lightweight 1.1 lb design supports comfortable all-day shooting