Get even closer to distant subjects with Canon’s Extender RF1.4x. Featuring a smart-connect design, this extender seamlessly attaches to select RF series lenses* and increases the focal length by a factor of 1.4x, helping expand your reach without compromising on overall quality or performance. Built with the latest high-refraction, low-dispersion glass to minimize chromatic aberration, and optimized coatings that reduce ghosting, this powerful extender is an ideal choice for sports and wildlife photographers. Plus, with a dust- and water-resistant construction - including a heat shield exterior coating to prevent overheating - the Extender RF1.4x makes a durable and versatile addition to your gear bag.Specifications: Focal Length & Maximum Aperture: Magnification: 1.4x Lens Construction: 7 elements in 4 groups Max. Diameter x Length, Weight: 2.8 x 0.8 in., 7.9 oz. / 71.2 x 20.3mm, 225g Note: This extender is only compatible with the following RF lenses RF100-400mm F5.6-8 IS USM, RF100-500mm F4.5-7.1 L IS USM, RF400mm F2.8 L IS USM, RF600mm F4 L IS USM, RF600mm F11 IS STM, RF800 F5.6 L IS USM, RF800mm F11 IS STM, RF1200mm F8 L IS USM. Please see the lens and/or camera body manual for full compatibility information with the Extender RF1.4x.