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 |