Nikon TC-14E II (1.4x) Teleconverter AF-S for Nikon Digital SLR Cameras (OLD MODEL) Enhanced Telephoto Versatilityes flare and ghosting Affordable and portable gateway to extend telephoto reach;wildlife, surveillance and more. 1.4x Optical Conversion Factor Increases the focal length by 40% of select compatible NIKKOR lenses. Nikon Integrated Coating (IC) Enhances light transmission efficiency, improves color consistency and reduces flare. Advanced Optical Design 5 elements in 5 groups optimized for use with FX & DX digital SLRs, engineeredto meet the needs of professional photographers