Increase the range of your Canon EF/EF-S lenses with this TELEPLUS HD DGX 1.4x Teleconverter from Kenko. Featuring a 1.4x magnification, this accessory can transform your 300mm lens into an effective 420mm option. Because it has electronic contacts, full communication is supported between the lens and camera; including metering, autofocus, and image stabilization. This model also has enhanced EXIF data; which writes equivalent focal length and aperture information. A digital multi-coating helps reduce flare and ghosting in your images.