Key Features
Spanning a versatile wide-angle Range, the EF 17-40mm f4L USM Lens is a Canon L-series zoom featuring a constant f4 maximum aperture along with a sophisticated optical design and durable construction. One Super UD element is featured, along with three aspherical elements, which help To reduce both chromatic and spherical aberrations in order To realize high sharpness, clarity, and color accuracy. A Super Spectra coating has also been applied To suppress flare and ghosting for improved contrast in difficult lighting conditions. Complementing the imaging capabilities, this wide-angle zoom also features a ring-type USM and internal focusing mechanism To afford quick, quiet, and accurate autofocus performance, as well as full-time manual focus override. Additionally, this lens is weather-sealed for use in trying environmental conditions.
Focal Length | 17 to 40mm |
Maximum Aperture | f/4 |
Minimum Aperture | f/22 |
Lens Mount | Canon EF |
Lens Format Coverage | Full-Frame |
Angle of View | 104° to 57° 30' |
Minimum Focus Distance | 11.02" / 28 cm |
Maximum Magnification | 0.24x |
Optical Design | 12 Elements in 9 Groups |
Diaphragm Blades | 7, Rounded |
Focus Type | Autofocus |
Image Stabilization | No |
Filter Size | 77 mm (Front) Gel Filter (Rear) |
Dimensions (ø x L) | 3.29 x 3.81" / 83.57 x 96.77 mm |
Length at Maximum Extension | 3.82" / 97 mm |
Weight | 1.1 lb / 500 g |
Packaging Info
Package Weight | 1.655 lb |
Box Dimensions (LxWxH) | 8.1 x 5.4 x 5.4" |