Canon EF 17-40mm f/4L USM Lens
Key Features
- EF-Mount Lens/Full-Frame Format
- Aperture Range: f/4 to f/22
- One Super Ultra-Low Dispersion Element
- Three Aspherical Element
- Super Spectra Coating
- Ring-Type Ultrasonic Motor AF System
- Weather-Sealed Construction
- Rounded 7-Blade Diaphragm
KSh 75,000
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.
Canon EF 17-40mm F/4L USM Specs
Focal Length | 17 to 40mm |
Maximum Aperture | f/4 |
Minimum Aperture | f/22 |
Lens Mount | Canon EF |
Format Compatibility | 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 | None |
Filter Size | 77 mm (Front) Gel Filter (Rear) |
Dimensions (ø x L) | 3.29 x 3.81″ / 83.57 x 96.77 mm |
Weight | 1.1 lb / 500 g |
Package Weight | 1.7 lb |
Box Dimensions (LxWxH) | 7.1 x 5.4 x 5.4″ |
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