Canon EF 1.4X II Telephoto Lens Extender - Professional DSLR Camera Accessory for Wildlife & Sports Photography

The Canon EF 1.4X II Extender offers a multiplier of up to your lens's maximum focal length of 135mm+ without diminishing image quality. It fits all Canon 135mm fixed focal length lenses (except the 135mm f/2.8 Soft focus lens) and also the EF 70-200mm f/2.8L, 70-200mm f/2.8L, 70-200mm f/4.0L, 70-200mm f/4.0L IS USM, and 100-400mm f/4.5-5.6L IS zoom lenses. Autofocus remains intact when used with lenses of f/4 or faster aperture. This version's optics are improved from the first with weather-resistant construction and improved anti-reflective surfaces, and it comes in at 2.9 inches in diameter, 1.1 inches long, and 7.8 ounces.