The Canon EF 2x II Extender is a premium teleconverter designed to double the focal length of any compatible Canon EF lens. Featuring a refined seven-element optical design with anti-reflective coatings, this extender maintains excellent image quality whilst extending your reach for distant subjects. With weather-resistant construction and seamless electronic communication between camera body and lens, it supports autofocus and Image Stabilization with EOS bodies when used with f/2.8 or faster lenses (reduces effective aperture by two stops). Ideal for sports, wildlife, and nature photography, the EF 2x II delivers professional-grade performance in a compact, durable package.