The Canon Extender RF 1.4x is ideal for sports, wildlife, and nature photography. The extender will increase the focal length of the Canon RF-series telephoto or telephoto zoom lens by a factor of 1.4x increasing the focal length even more. There’s no need to stress of image quality worsening as it will still retain the best of image quality; it’s designed to perform in extremes and it features a dust/moisture resistance.