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Rent NowThe Canon EF 17-40mm f/4L USM is a lightweight L-series ultra-wide-angle zoom lens designed for full-frame Canon EF-mount DSLRs. Featuring a constant f/4 maximum aperture, it maintains consistent exposure throughout the zoom range while offering a versatile field of view ideal for landscape, architectural, and group photography. The optical layout includes three aspherical elements and one Super Ultra-Low Dispersion (Super UD) element, which work together to minimize distortion, spherical aberrations, and color fringing for sharp, color-accurate output. Equipped with a ring-type Ultrasonic Motor (USM) for fast, near-silent autofocus and full-time manual focus override, this durable, weather-sealed lens offers reliable performance in demanding environments.
Key Features & Specifications
* Ultra-Wide Standard Zoom: Provides a 17-40mm focal range on full-frame cameras (27.2-64mm equivalent on APS-C sensors).
* Constant f/4 Maximum Aperture: Keeps exposure settings consistent across the entire zoom range.
* Advanced Optics: Incorporates 1 Super UD element and 3 aspherical elements to significantly reduce chromatic aberrations and distortion.
* Ring-Type USM Autofocus: Delivers rapid, precise, and quiet AF operation with full-time manual focus control.
* Weather-Sealed L-Series Build: Built to withstand harsh weather conditions with dust- and moisture-resistant sealing.
* Close Focusing Distance: Focuses down to 11 inches (28 cm) throughout the zoom range for close-up perspective control.
* 77mm Front Filter Thread: Accepts standard 77mm filters for polarizers, NDs, and protective glass.
Condition, Included Accessories & Notes
* Includes the lens hood.
* Optical Condition: Has some light dust present inside the lens elements.
