The Canon EF 17-40mm f4L USM is a professional wide angle zoom lens designed to deliver reliable performance, strong optical quality, and durable construction for demanding photographers. Covering a versatile wide focal range, it is well suited for landscapes, architecture, interiors, travel, and documentary work, while remaining compatible with both full frame and APS C Canon EF mount DSLR cameras. A constant f4 maximum aperture ensures consistent exposure throughout the zoom range, making it easier to work in changing light while maintaining a compact and lightweight form factor compared to faster wide angle zooms. The optical design incorporates one Super Ultra Low Dispersion element and three aspherical elements, effectively reducing chromatic aberrations, distortion, and spherical aberrations to produce sharp images with accurate color and high contrast. Canon Super Spectra coatings further improve image quality by minimizing flare and ghosting, especially when shooting in strong or backlit conditions. Autofocus is driven by a ring type Ultrasonic Motor combined with an internal focusing system, delivering fast, precise, and near silent focusing with full time manual focus override for fine adjustments. As part of Canon's L series, the lens is sealed against dust and moisture, making it dependable in harsh or unpredictable environments. Additional features such as a rounded seven blade diaphragm for smooth out of focus rendering, a standard 77mm front filter thread, and a rear gel filter holder add flexibility for creative control and professional workflows.

Manufacturer Items Include:
Canon EF 17-40mm f/4L USM Lens
Canon E-77 II Lens Cap
Canon Lens Dust Cap E (Rear)
Canon EW-83E Lens Hood
Canon Lens Case LP1319

Bundle Items Include:
Canon EF 17-40mm f/4L USM Lens
Lens Case
Cleaning Kit