Canon EF 17-40mm f/4L USM Lens
$749.00 USD
- EF Mount L-Series Lens
- Aperture Range: f/4-22
- Three Aspherical Elements, One Super UD
- Ultrasonic Autofocus Motor
- Manual Focus Override
- Water and Dust Resistant
- Internal Zooming and Focusing
- Truly Circular Diaphragm
- 77mm Front Filter Diameter
- Rear Holder for Three Gel Filters
The Canon EF 17-40mm f/4L USM Lens is a high quality "L" series wide angle zoom lens for full frame and APS-C size DSLR cameras. It combines one high-precision molded glass aspherical element and two replica aspherical lenses to achieve the extended zoom range, while also correcting for common aberrations that arise during zooming. A Super UD (Ultra-low Dispersion) glass element minimizes the chromatic aberration of magnification which tends to occur with wide-angle lenses, to help eliminate color bleed along the edges of the subject and achieve high image contrast and resolution.
Key Specifications
| Camera Mount | Canon EF |
| Lens Mount | Canon |
| Focal Length | 17-40mm (APS-C: 27.2-64mm) |
| Aperture | f/4 |
| Image Stabilization | No |
| Autofocus | USM (UltraSonic Motor) |
| Zoom | Yes |
| Minimum Focus Distance | 11.02" (28 cm) |
| Filter Thread Diameter | 77mm |
| Dimensions | 3.29 x 3.81" (83.5 x 96.8 mm) |
| Weight | 1.05 lb (475 g) |
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