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Increase your lens' focal length by 2x without sacrificing image qualityIdeal for press, sports and nature photography, the extender increases the focal length of Canon L-series telephoto or telephoto zoom lens’ by a factor of 2x, with higher AF accuracy and improved communication between camera and lens- Extends the master lens focal length by 2x- Outstanding image quality- Highly resistant to dust and water- Improved communication between lens and camera- Optimised lens coatings- Compatible with L-Series telephoto and telephoto zoom lensesFocal length extension for super-telephoto lensesThe Extender EF 2x III is specially designed to work in conjunction with L-series IS super-telephoto lenses, extending their focal length by a factor of 2x. The extender's design ensures there is no loss of lens performance or image quality.High-quality constructionImproved anti-reflection materials inside the lens-barrel and a coating around the outer edges of the lens elements reduce flare. Construction is resistant to dust and water, helping to maintain images quality.Improved communication between lens and cameraA built in microprocessor provides accurate transfer of data from between the lens and camera delivering an improved performance in AF and metering.Compatible with L-Series telephoto and telephoto zoom lensesThe Extender EF 2x III is compatible with most telephoto and telephoto zoom lenses within Canon’s flagship professional L-series range, extending the focal length while only reducing the effective aperture of the lens by two stop.

Versatile super-telephoto performanceThe EF 100-400MM F/4.5-5.6L IS II USM is ideal for photographers who are travelling light and want to take just one telephoto lens with them. A great choice for sports and wildlife photography – the 100-400mm zoom range puts you right next to distant subjects, and lets you react quickly in a fast-changing situation. When used on cameras featuring APS-C sized sensors, the EF 100-400MM F/4.5-5.6L IS II USM offers angles of view equivalent to a 160-640mm on a full-frame camera.Stay sharp, whatever the lightThe EF 100-400MM F/4.5-5.6L IS II USM delivers sharp, high-contrast images, using Fluorite and Super Ultra-low Dispersion (Super UD) lens elements to tackle artefacts and distortion. A three-mode Image Stabilizer guards against blur from camera shake, allowing handheld shooting with shutter speeds up to 4 stops slower than normal.Fear no flareShoot into the light confident that Canon’s multi-layered Air Sphere Coating (ASC) will protect against flare, ghosting and reduced contrast. ASC uses a multi-layer coating to reduce reflections including a layer of nanosized air spheres deposited on the lens surface to slow down light more gradually as it enters the lens, this prevents the internal reflections that reduce image quality.Ergonomic handlingDifferent photographers work in different ways. Use the Zoom Touch Adjustment ring to set the amount of resistance felt when zooming the lens: a light touch is ideal when you’ll be working quickly in a fast-changing situation. On the other hand, you might want to stiffen or lock the zoom mechanism when you don’t want the focal length to change accidentally.Fast focus when you want itEnjoy fast USM autofocus that locks on accurately and in near-silence. Full-time manual focus override allows precise adjustment without taking your camera away from your eye. The EF 100-400MM F/4.5-5.6L IS II USM focuses down to 0.98m, letting you react to subjects that come unexpectedly close.Protected from the great outdoorsKeep shooting even in tough weather conditions. As an L-series lens, the EF 100-400MM F/4.5-5.6L IS II USM is sealed against dust and moisture, so you can keep shooting even when conditions turn bad. A fluorine coating on the lens’ front element repels dirt making the lens easy to clean.