Extend your reach with a 1.4x extender designed specifically for the RF lens system, maintaining image quality and high speed communication between the camera and lens. Extend your vision The Extender RF 1.4x is the perfect choice for enthusiast and professional photographers seeking more magnification from their RF lenses. Boosting focal length by 1.4x it is ideal for press, nature and sport photographers. More reach, no loss of image quality The extender features high-refraction, low-dispersion glass to control curvature of field and chromatic aberration of magnification for the highest image quality. Advanced lens design As well as optimized lens coatings, a 3-layer combined lens helps to reduce ghosting by reducing the surfaces in contact with the air as much as possible. Designed to perform in extremes The exterior is coated in the same white heat shield coating as used on the RF 100-500mm F4.5-7.1L IS USM and RF 70-200mm lens to prevent deterioration in performance in high temperatures.