Nikon TC-14E III Teleconverter Review
Handling and Features Performance Verdict Specification This 1.4x tele-converter fits between a lens and your Nikon camera, increasing the focal length of the lens by 40% and reducing the maximum aperture by one stop.
Reduction in sharpness with converter is almost imperceptible; Excellent build quality; Reasonably lightweight and compact; Reduced falloff with converter; Weather sealed; Support for Nikon's latest lenses with electromagnetic aperture; Fluorine coating on lens surfaces to repel dust and moisture
Price could be difficult to justify if you don't own a lens with an electromagnetic aperture; Extra tab on front bayonet mount prevents mounting third party and older lenses on the converter