Canon EF 17-40mm f/4L-Series USM Ultra Wide-Angle Lens
A new and affordable L-series ultra-wide-angle zoom lens that's ideal for both film and digital SLRs. Superior optics are assured by the use of three Aspherical lens elements, in addition to a Super UD (Ultra-low Dispersion) glass element. Optical coatings are optimized for use with digital cameras. This lens focuses as close as 11 inches (0.28m), and offers both Canon's full-time manual focus and a powerful ring-type USM for fast and silent AF. It has a constant f/4 maximum aperture, and offers the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters. Finally, it offers weather-resistant construction similar to other high-end L-series lenses.
Key Features:
L-Series Designation
Canon's legendary L-Series line-up signifies ultimate build quality. Using Canon's finest optics for sharpness, these lenses also have faster focusing motors, better Image Stabilizers and are built to be used day in day out for many years.
Durability
High performance, water-resistant and dust resistent internal seals.
3 High-Precision Aspherical Elements
By using 3 asperical elements, the Canon EF 17-40mm f/4L USM lens combats chromatic aberration.
1 Ultra Low Dispersion Element (UD)
Using 1 UD glass element the Canon EF 17-40mm f/4L USM lens has improved edge to edge sharpness.
Ultra Sonic Motor (USM) and M/A Focus
Canon's Ultrasonic motors are designed to be faster focusers so you won't miss the shot. The M/A (auto focus with manual override) ring allows you to fine focus your shot while still in auto focus mode.
Canon USA 1-Year Limited Warranty Included
Supplied Accessories:
77mm Snap-On Lens Cap
Lens Dust Cap E (Rear)
EW-83E Lens Hood
Lens Case LP1319
A new and affordable L-series ultra-wide-angle zoom lens that's ideal for both film and digital SLRs. Superior optics are assured by the use of three Aspherical lens elements, in addition to a Super UD (Ultra-low Dispersion) glass element. Optical coatings are optimized for use with digital cameras. This lens focuses as close as 11 inches (0.28m), and offers both Canon's full-time manual focus and a powerful ring-type USM for fast and silent AF. It has a constant f/4 maximum aperture, and offers the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters. Finally, it offers weather-resistant construction similar to other high-end L-series lenses.
Key Features:
Canon's legendary L-Series line-up signifies ultimate build quality. Using Canon's finest optics for sharpness, these lenses also have faster focusing motors, better Image Stabilizers and are built to be used day in day out for many years.
High performance, water-resistant and dust resistent internal seals.
By using 3 asperical elements, the Canon EF 17-40mm f/4L USM lens combats chromatic aberration.
Using 1 UD glass element the Canon EF 17-40mm f/4L USM lens has improved edge to edge sharpness.
Canon's Ultrasonic motors are designed to be faster focusers so you won't miss the shot. The M/A (auto focus with manual override) ring allows you to fine focus your shot while still in auto focus mode.
Canon USA 1-Year Limited Warranty Included
Supplied Accessories:
77mm Snap-On Lens Cap
Lens Dust Cap E (Rear)
EW-83E Lens Hood
Lens Case LP1319
| Focal Length & Maximum Aperture | 17 - 40mm; 1:4 |
Lens Construction |
12 elements in 9 groups |
Diagonal Angle of View |
104° - 57° 30' |
Focus Adjustment |
Inner focusing system with USM |
Closest Focusing Distance |
0.28m / 0.9 ft. |
Zoom System |
Rotating type |
Filter Size |
77mm |
Max. Diameter x Length, Weight |
3.3" x 3.8", 1.1 lb. / 83.5 x 96.8mm, 500g |
