Canon EF 1.4X II Extender Telephoto Accessory

1.4x telephoto extender for multiplying focal length of Canon 135mm or longer lensesFits all 135mm or longer fixed focal length lenses and some 70-200mm telephoto lensesPreserves autofocus on any EOS camera when combined with f/4 or faster lensWeather-resistant construction and improved anti-reflective surfaces in the barrelMeasures 2.9 inches in diameter and 1.1 inches long; weighs 7.8 ounces
Product DescriptionThis Canon 6845A004 EF 1. 4x II Tele Extender can be used with fixed focal

Source: Digital Camera and Video Store...