EF 17-40mm f/4L USM Lens Product Image

EF 17-40mm f/4L USM Lens


Product Description

Spanning a versatile wide-angle range, the EF 17-40mm f/4L USM Lens is a Canon L-series zoom featuring a constant f/4 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
Pinhole Diameter
Lens Mount Canon EF
Lens Mount
Lens Mount
Format Compatibility Full-Frame
Angle of View 104� to 57� 30'
Area of Coverage
Tilt-Shift
Minimum Focus Distance 11.02" / 28 cm
Maximum Magnification 0.24x
Macro Reproduction Ratio
Optical Design 12 Elements in 9 Groups
Diaphragm Blades 7, Rounded
Focus Type Autofocus
Image Stabilization None
Leaf Shutter
Tripod Collar
Filter Size 77 mm (Front)
Gel Filter (Rear)
Dimensions (� x L) 3.29 x 3.81" / 83.57 x 96.77 mm
Weight 1.1 lb / 500 g