The 1.4x extender has been specifically designed for the Canon RF lens system and maintains the lens's image quality as well as high-speed communication with the camera. The RF 1.4x extender is the perfect choice for photography enthusiasts and professionals looking to extend the focal length range of their RF lenses. The 1.4x increase in focal length is ideal for press, nature, and sports photographers.

The extender features lenses made from highly refractive glass and low dispersion glass. This helps combat field curvature and chromatic aberrations, ensuring excellent image quality. In addition to optimized lens coatings, a three-layer combination lens helps reduce ghosting by minimizing the number of critical glass/air surfaces as much as possible. The outer surface of the tube is coated with the same white heat-reflective coating as the RF 100-500mm F4.5-7.1L IS USM and RF 70-200mm lenses, preventing performance degradation at high temperatures.