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A new and affordable L-series ultra-wide-angle zoom lens thats perfect for film and digital SLRs. Excellent optics are guaranteed 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 eleven inches (0.28m), and offers both Canons full-time manual focus and a powerful ring-type USM for fast and quiet auto-focus. 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 3 gel filters. Lastly, it offers weather-resistant build similar to other high-end L-series lenses.
About half the price of the 16-35 f/2.8 lens, this L-series lens has an entirely new optical design with 3Aspherical elements and a Super UD-glass element. The combination gives excellent contrast and sharpness, even at the widest appertures. Its great for both film and digital SLRs, and features the same weather-resistant design, rear gel filter holder, and high-speed Ultrasonic Motor as the EF 1 6-35mm lens. Features | • | EF mount; ultra-wide zoom lens | | • | Super Ultra-low Dispersion glass; inner focusing; aspherical lens; full-time manual focus | | • | 17-40mm focal length | | • | f/4 constant maximum aperture | | • | Ring-type UltraSonic Motor (USM) |
Contents in original box | • | 1 EF 17-40mm f/4L USM Lens | | • | 1 front cap | | • | 1 rear cap | | • | 1 user manual |
Specification | 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 | | Maximum Diameter x Length | 83.5 x 96.8mm | | Weight | 500g |
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