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"","","798380","","Canon","8806A014","798380","","Camera Lenses","588","","","EF 17-40mm f/4.0L USM","20221021103210","ICECAT","","25680","https://images.icecat.biz/img/norm/high/798380-7820.jpg","200x260","https://images.icecat.biz/img/norm/low/798380-7820.jpg","https://images.icecat.biz/img/gallery_mediums/img_798380_medium_1480941668_6727_7799.jpg","https://images.icecat.biz/thumbs/798380.jpg","","","Canon EF 17-40mm f/4.0L USM SLR Ultra-wide lens Black","EF 17-40mm f/4.0L USM","Canon EF 17-40mm f/4.0L USM, Ultra-wide lens, 12/9, 17 - 40 mm, Canon EF","Canon EF 17-40mm f/4.0L USM. Component for: SLR, Lens structure (elements/groups): 12/9, Lens type: Ultra-wide lens. AF actuator: USM, Maximum magnification: 0.24x. Product color: Black. Diameter: 8.35 cm, Filter size: 7.7 cm, Length: 96.8 mm","<b>The EF17-40mm f/4L USM is a lightweight ultra wide angle Canon EF zoom lens. It is especially well suited for use with digital EOS SLR cameras with a focal length conversion factor higher than 1.</b>\n\n<b>Ultra wide lens for analogue EOS SLR cameras</b>\nThe EF17-40mm f/4L USM is an ultra wide angle Canon EF zoom lens meant for professional and high amateur SLR EOS camera users.\n\n<b>Standard zoom lens for digital EOS SLR cameras</b>\nWhile it is an excellent lens when used with an analogue 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 approximately equivalent to that of a 28-70mm lens used on a 35mm camera, which makes it the ideal standard zoom lens.\n\n<b>Superior optical performance</b>\nThe EF17-40mm f/4L USM has 12 lens elements arranged in 9 groups. Super Spectra Coating on the elements ensures excellent colour balance and minimises ghosting and 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.\n\n<b>Extensive set of high-end features</b>\nMinimum focusing distance is just 28mm throughout the entire zoom range.\n\nThe Auto-focus works silently and quickly thanks to a fast central processing unit with an improved AF algorithm. You can override AF mode with manual focus should you wish.\n\nControlled 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.\n\nThe front of the lens does not rotate as you focus. This means, for example, that polarising filters still function effectively as you zoom in and out. At the rear of the lens there’s a drop-in gelatin filter holder.\n\nHighly resistant to moisture and 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.","https://images.icecat.biz/img/norm/high/798380-7820.jpg","200x260","","","","","","","","","","Lens system","Component for: SLR","Lens structure (elements/groups): 12/9","Lens type: Ultra-wide lens","Closest focusing distance: 0.28 m","Maximum aperture number: 22","Lens mount interface: Canon EF","Focal length range: 17 - 40 mm","Number of diaphragm blades: 7","Performance","AF actuator: USM","Maximum magnification: 0.24x","Design","Product color: Black","Weight & dimensions","Diameter: 8.35 cm","Filter size: 7.7 cm","Length: 96.8 mm","Weight: 500 g"