With Canon's Extender RF1.4x, you can get even closer to distant subjects while maintaining excellent overall quality and performance. This powerful extender easily attaches to select RF series lenses* and increases the focal length by a factor of 1.4x, giving you greater reach for sports and wildlife photography. Built with high-refraction, low-dispersion glass and optimized coatings, the Extender RF1.4x minimizes chromatic aberration and ghosting for clear, sharp images. Plus, its dust- and water-resistant construction and heat shield exterior make it durable enough to withstand the elements.