The EF17-40mm f/4L USM is an ultra wide angle Canon EF zoom lens meant for professional & high amateur SLR EOS camera users. While it is an excellent lens when used with an analog SLR camera, the EF17-40mm f/4L USM is especially well suited for digital SLR cameras with an imaging sensor size smaller than the 35mm format. Indeed on such digital SLR cameras these focal lengths can give an angle of view Approx. equivalent to that of a 28-70mm lens used on a 35mm camera, which makes it the ideal standard zoom lens. The EF17-40mm f/4L USM has 12 lens elements arranged in 9 groups. Super Spectra Coating on the elements ensures excellent color balance & minimizes ghosting & flare. To provide superb image quality over a 17-40mm zoom range the lens uses three aspheric elements of two different types, while Super UD (Ultra-low Dispersion) glass is used to prevent the chromatic aberrations that often can degrade the subject edge clarity. Minimum focusing distance is just 28mm throughout the entire zoom range. The Auto-focus works silently & quickly thanks to a fast central processing unit with an enhanced AF algorithm. You can override AF mode with manual focus should you wish. Controlled by an electromagnetic diaphragm, the EF17-40mm f/4L USM's circular aperture can achieve a more attractive appearance to out of focus background areas in a picture. The front of the lens does not rotate as you focus. This means, for example, that polarizing filters still function effectively as you zoom in & out. At the rear of the lens there's a drop-in gelatin filter holder. Highly resistant to moisture & dust, the EF17-40mm f/4L USM is ideally suited for use in harsh environments. Environment friendly lead-free glass is used throughout its construction. ...

A professional-quality standard zoom offers superlative image quality & a fast f/2.8 maximum aperture throughout its zoom range. It is perfect companion to any full-frame EOS camera. The EF 24-70 mm f/2.8L II USM delivers superb image quality throughout its zoom range, thanks to aspherical lens elements & ultra-low dispersion (UD) & super UD glass. Redesigned optics ensures sharpness is maximized across the frame. A fast f/2.8 maximum aperture is maintained throughout the zoom range, enabling h&-held low-light shooting in a variety of situations. The EF 24-70 mm f/2.8L II USM is robust enough for daily professional use. Weather sealing protects against dust & moisture, while a fluorine-coated front & rear elements are easy to clean. ...

A professional-quality standard zoom offers superlative image quality & a fast f/2.8 maximum aperture throughout its zoom range. It is perfect companion to any full-frame EOS camera. The EF 24-70 mm f/2.8L II USM delivers superb image quality throughout its zoom range, thanks to aspherical lens elements & ultra-low dispersion (UD) & super UD glass. Redesigned optics ensures sharpness is maximized across the frame. A fast f/2.8 maximum aperture is maintained throughout the zoom range, enabling h&-held low-light shooting in a variety of situations. The EF 24-70 mm f/2.8L II USM is robust enough for daily professional use. Weather sealing protects against dust & moisture, while a fluorine-coated front & rear elements are easy to clean. ...

A professional-quality standard zoom offers superlative image quality & a fast f/2.8 maximum aperture throughout its zoom range. It is perfect companion to any full-frame EOS camera. The EF 24-70 mm f/2.8L II USM delivers superb image quality throughout its zoom range, thanks to aspherical lens elements & ultra-low dispersion (UD) & super UD glass. Redesigned optics ensures sharpness is maximized across the frame. A fast f/2.8 maximum aperture is maintained throughout the zoom range, enabling h&-held low-light shooting in a variety of situations. The EF 24-70 mm f/2.8L II USM is robust enough for daily professional use. Weather sealing protects against dust & moisture, while a fluorine-coated front & rear elements are easy to clean. ...

The EF 24-70 mm f/4L IS USM is the perfect zoom to complement full-frame DSLRs like the EOS 6D. With 2 aspheric & 2 UD elements, the EF 24-70 mm f/4L IS USM delivers high- quality images with excellent detail throughout the entire zoom range. A 9-blade circular diaphragm delivers beautiful, soft backgrounds. It offers a minimum focusing distance of 1.25 feet across the entire zoom range & has a macro mode at the telephoto end with up to 0.7x magnification & is easily accessible with a one-touch switch. It features a Hybrid IS system with up to 4 stops of stabilization, compensating for both angular & shift types of camera shake, delivering effective stabilization even in macro. Inner focusing & ring-type USM deliver, fast, quiet AF, & full-time manual focus is available for manual focusing even while in AF mode. The durable EF 24-70 mm f/4L IS USM is sealed for excellent dust & water resistance plus has fluorine coating on the front & rear elements reducing smear & fingerprints. Compact & lightweight, its the perfect L-series lens for photographers on the go. ...

The EF 24-70 mm f/4L IS USM is the perfect zoom to complement full-frame DSLRs like the EOS 6D. With 2 aspheric & 2 UD elements, the EF 24-70 mm f/4L IS USM delivers high- quality images with excellent detail throughout the entire zoom range. A 9-blade circular diaphragm delivers beautiful, soft backgrounds. It offers a minimum focusing distance of 1.25 feet across the entire zoom range & has a macro mode at the telephoto end with up to 0.7x magnification & is easily accessible with a one-touch switch. It features a Hybrid IS system with up to 4 stops of stabilization, compensating for both angular & shift types of camera shake, delivering effective stabilization even in macro. Inner focusing & ring-type USM deliver, fast, quiet AF, & full-time manual focus is available for manual focusing even while in AF mode. The durable EF 24-70 mm f/4L IS USM is sealed for excellent dust & water resistance plus has fluorine coating on the front & rear elements reducing smear & fingerprints. Compact & lightweight, it's the perfect L-series lens for photographers on the go. ...

Empowering landscape & wide-angle photographers with enhanced optical performance, Canon EF 24 mm lens features Image Stabilization technology & ultrasonic motor-powered auto focus. It features Canon's Optical Image Stabilizer technology providing up to four shutter speed stops of correction. With the Optical Image Stabilizer turned on, photographers can capture sharp wide-angle images in low-light settings reducing the need for a flash or a tripod. Aspherical lens elements improve the peripheral image quality & a seven-blade circular diaphragm delivers beautiful, soft backgrounds. ...

A highly portable pancake lens that's ideal for travel & street photography. Its advanced optical design ensures great image quality, while a large f/2.8 maximum aperture allows h&-held low-light shooting. STM focusing delivers smooth, near-silent AF when capturing movies. ...

This L-series is a professional f/1.4 wide-angle lens with an aspherical lens element to correct aberrations. With an innovative floating system, which enables a high picture quality to be obtained over the entire focusing range you can be confident that you get the best pictures time after time. Autofocusing is also quick & quiet with rear focusing & ring USM. To get even more out of this lens a full-time manual focus is also available, picture quality & Canon innovation go hand in h&. ...

This L-series is a professional f/1.4 wide-angle lens with an aspherical lens element to correct aberrations. With an innovative floating system, which enables a high picture quality to be obtained over the entire focusing range you can be confident that you get the best pictures time after time. Autofocusing is also quick & quiet with rear focusing & ring USM. To get even more out of this lens a full-time manual focus is also available, picture quality & Canon innovation go hand in h&. ...