Nikon AF-S FX TC-17E II (1.7x) Teleconverter Lens with Auto Focus for Nikon DSLR Cameras Enhanced Telephoto Versatility  Affordable and portable gateway to extend telephoto reach; ideal for sports, wildlife, surveillance and more. 1.7x Optical Conversion Factor  Increases the focal length by 70% of select compatible NIKKOR lenses. Nikon Integrated Coating (IC)  Enhances light transmission efficiency, improves color consistency and reduces flare. Advanced Optical Design  7 elements in 5 groups optimized for use with FX and DX digital SLRs, engineeredto meet the needs of professional photographers. Lens CompatibilityThe following lenses may be used with the Nikon TC-17E II, some with noted functional limitations. NIKKOR lenses not listed cannot be used with the TC-17E II. The list includes current lenses along with lenses for which production may have ceased. Lenses that are no longer in production are shown only for your convenience as a compatibility reference. Autofocus not possible with - AF-S VR Micro-NIKKOR 105mm f/2.8G IF-ED, AF-S NIKKOR 300mm f/4D IF-ED, AF-S NIKKOR 500mm f/4G ED VR, AF-S NIKKOR 500mm f/4D IF-ED II, AF-S NIKKOR 500mm f/4D IF-ED, AF-I NIKKOR 500mm f/4D IF-ED, AF-S NIKKOR 600mm f/4G ED VR, AF-S NIKKOR 600mm f/4D IF-ED II, AF-S NIKKOR 600mm f/4D IF-ED, AF-I NIKKOR 600mm f/4D IF-ED, AF-S VR Zoom-NIKKOR 200-400mm f/4G IF-ED. No limitations with - AF-S VR NIKKOR 200mm f/2G IF-ED, AF-S NIKKOR 300mm f/2.8G ED VR II, AF-S VR NIKKOR 300mm f/2.8G IF-ED, AF-I NIKKOR 300mm f/2.8D IF-ED, AF-S NIKKOR 400mm f/2.8G ED VR, AF-S NIKKOR 400mm f/2.8D IF-ED II, AF-S NIKKOR 400mm f/2.8D IF-ED, AF-I NIKKOR 400mm f/2.8D IF-ED, AF-S NIKKOR 70-200mm f/2.8G ED VR II, AF-S VR Zoom-NIKKOR 70-200mm f/2.8G IF-ED, AF-S Zoom-NIKKOR 80-200mm f/2.8D IF-ED.