Canon Extender EF II (1.4x) (6845A004C) Lens Converter

This tele extender can be used with fixed focal length lenses 135mm and longer (except the 135mm f/2.8 Softfocus lens), and the EF 70-200 f/2.8L, 70-200 f/2.8L IS, 70-200 f/4.0L, and 100-400 f/4.5-5.6L IS* zoom, EF 400 f/5.6L* lenses. Superb optically, it preserves the image quality of the lens it s mounted to and multiplies its focal length 1.4x. Effective aperture is reduced by one f-stop; autofocus is possible on any EOS camera when combined with a lens having an f/4 or faster maximum aperture. The new version II maintains the outstanding optics of the previous version, and adds enhanced weather- resistant construction, and improved anti-reflective surfaces in the barrel. * In most cases, autofocus is disabled if extender is combined with this lens. All other lens functions work normally.

1.4x telephoto extender for multiplying focal length of Canon 135mm or longer lenses Fits all 135mm or longer fixed focal length lenses and some 70-200mm telephoto lenses Preserves autofocus on any EOS camera when combined with f/4 or faster lens Weather- resistant construction and improved anti-reflective surfaces in the barrel Measures 2.9 inches in diameter and 1.1 inches long; weighs 7.8 ounces