From the ManufacturerBroaden your perspective with the Canon EF 17-40mm ultra-wide-angle zoom lens. Ideal for both film and digital SLR cameras, the lens offers three aspherical lens elements in addition to a Super UD (ultra-low dispersion) glass element, creating superior optics in all conditions. In addition, the lens focuses as close as 11 inches (0.28mm), and offers both Canon's full-time manual focus and a powerful ring-type ultra-sonic monitor (USM) that produces fast and silent autofocus. Other features include a constant f/4 maximum aperture, the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters, and optical coatings optimized for use with digital cameras. Boasting weather-resistant construction similar to other high-end L-series cameras, the lens carries a one-year warranty.Focal length: 17-40mm Maximum aperture: 1:4 Lens construction: 12 elements in 9 groups Diagonal angle of view: 104 to 57 degrees (at 30 feet) Focus adjustment: Inner focusing system with USM Closest focusing distance: 0.9 feet Zoom system: Rotating type Filter size: 77mm Dimensions: 3.3 inches in diameter, 3.8 inches long Weight: 1.1 pounds 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.About half the price of the 16-35 f/2.8 lens, this L-series lens has an entirely new optical design with three Aspherical elements and a Super UD-glass element. The combination provides superb contrast and sharpness, even at the widest settings. It's ideal 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 16-35mm lens.What's in the box: Canon EF 17-40mm f/4L USM Lens,E-77U 77mm Snap-On Lens Cap,Lens Dust Cap E (Rear),EW-83E Lens Hood,Lens Case LP1319 and 1-Year Warranty.Product DescriptionBroaden your perspective with the Canon EF 17-40mm ultra-wide-angle zoom lens. Ideal for both film and digital SLR Cameras, the lens offers three aspherical lens elements in addition to a Super UD (ultra-low dispersion) glass element, creating superior optics in all conditions. Broaden your perspective with the Canon EF 17-40mm ultra-wide-angle zoom lens. Ideal for both film and digital SLR Cameras, the lens offers three aspherical lens elements in addition to a Super UD (ultra-low dispersion) glass element, creating superior optics in all conditions. In addition, the lens focuses as close as 11 inches (0.28mm), and offers both Canon's full-time manual focus and a powerful ring-type ultra-sonic monitor (USM) that produces fast and silent autofocus. Other features include a constant f/4 maximum aperture, the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters, and optical coatings optimized for use with digital Cameras. Boasting weather-resistant construction similar to other high-end L-series Cameras, the lens carries a one-year warranty. About half the price of the 16-35 f/2.8 lens, this L-series lens has an entirely new optical design with three Aspherical elements and a Super UD-glass element. The combination provides superb contrast and sharpness, even at the widest settings. It's ideal 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 16-35mm lens. What's in the box: Canon EF 17-40mm f/4L USM Lens,E-77U 77mm Snap-On Lens Cap,Lens Dust Cap E (Rear),EW-83E Lens Hood,Lens Case LP1319 and 1-Year Warranty. Broaden your perspective with the Canon EF 17-40mm ultra-wide-angle zoom lens. Ideal for both film and digital SLR cameras, the lens offers three aspherical lens elements in addition to a Super UD (ultra-low dispersion) glass element, creating superior optics in all conditions. In addition, the lens focuses as close as 11 inches (0.28mm), and offers both Canon's full-time manual focus and a powerful ring-type ultra-sonic monitor (USM) that produces fast and silent autofocus. Other features include a constant f/4 maximum aperture, the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters, and optical coatings optimized for use with digital cameras. Boasting weather-resistant construction similar to other high-end L-series cameras, the lens carries a one-year warranty. About half the price of the 16
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Frequently Asked Questions
Q: What is the focal length of the Canon EF 17-40mm lens?A: The focal length is seventeen to forty millimeters. This range provides versatility for ultra-wide-angle photography.
Q: What is the maximum aperture of this lens?A: The maximum aperture is f/4. This allows for good light entry, making it suitable for various shooting conditions.
Q: How many elements does the lens have?A: The lens construction includes twelve elements in nine groups. This design enhances optical performance and image quality.
Q: What is the closest focusing distance of the lens?A: The closest focusing distance is eleven inches. This feature allows for capturing detailed close-up shots.
Q: What are the dimensions of the Canon EF 17-40mm lens?A: The lens measures three point three inches in diameter and three point eight inches in length. It weighs one point one pounds.
Q: What materials is the lens made from?A: The lens features a metal barrel and metal mount. These materials contribute to its durability and quality.
Q: How do I use the Canon EF 17-40mm lens?A: To use the lens, attach it to a compatible Canon SLR camera. Adjust the zoom and focus as needed for your desired shot.
Q: Is this lens suitable for beginners?A: Yes, this lens is suitable for beginners and professionals alike. Its user-friendly features make it accessible for all skill levels.
Q: Can I use filters with this lens?A: Yes, the lens supports screw-in seventy-seven millimeter filters. It also has a rear holder for up to three gel filters.
Q: How do I maintain this lens in good condition?A: To maintain the lens, keep it clean and store it in a protective case. Avoid exposing it to extreme weather conditions.
Q: Is the Canon EF 17-40mm lens weather-resistant?A: Yes, the lens has weather-resistant construction. This makes it suitable for outdoor photography in various conditions.
Q: What should I do if the lens arrives damaged?A: If the lens arrives damaged, contact the retailer immediately for a return or exchange. Keep the original packaging for the return process.
Q: What is the warranty period for this lens?A: The lens comes with a one-year warranty. This covers manufacturing defects and ensures quality assurance.
Q: Is this lens ideal for landscape photography?A: Yes, this lens is ideal for landscape photography. Its ultra-wide-angle capabilities allow for expansive views.
Q: Can I use this lens for low-light photography?A: Yes, the f/4 maximum aperture is suitable for low-light photography. However, using a tripod may enhance stability in darker settings.
