Seriously upgrade zooming capabilities with a Kenko camera lens for Canon cameras. The Kenko PRO 300 lens is actually a teleconverter, not a true lens. It is placed between the camera and the actual lens to increase magnification. In the case of this Kenko camera lens for Canon, it is a 1.4x teleconverter lens capable of enhancing the focus lens. For a 200 mm lens, the Kenko PRO 300 lens will turn it into a 280mm lens. This product works best with lens greater than 50mm to give optimal zooming advantages to the camera. All of Kenko’s teleconverter lens has Gate Array Integrated Circuitry that allows the lens to operate in the exact same way as the manufacturer’s converter for optimal lighting conditions. This 1.4x teleconverter lens is indispensable for photographers who often find themselves taking shots from extreme distances, such as wildlife or nature photographers. Gain some extra power by installing a Kenko camera lens for Canon in addition to a true camera lens for the best results.