The Nikon TC-14E II 1.4X Teleconverter for AF-S Lenses increases the focal length by 40% of select compatible NIKKOR lenses.Works With: 400mm f/2.8E FL ED VR 80-400mm f/4.5-5.6G ED VR 800mm f/5.6E FL ED VR 200-400mm f/4G ED VR II 300mm f/2.8G ED VR II 70-200mm f/2.8G ED VR II VR NIKKOR 200mm f/2G IF-ED VR Micro-Nikkor 105mm f/2.8G IF-ED 300mm f/4D IF-ED 500mm f/4G ED VR VR Zoom-NIKKOR 70-200mm f/2.8G IF-ED 600mm f/4G ED VR 400mm f/2.8G ED VR VR NIKKOR 300mm f/2.8G IF-ED VR Zoom-NIKKOR 200-400mm f/4G IF-ED