Nikon TC-20E III 2x Teleconverter for AF-S, AF-I Lens - Ex-Display Stock

The Nikon TC-20E III 2x Teleconverter is an exceptional teleconverter optimized for use with FX and DX digital SLR cameras. It doubles the focal length of compatible Nikkor lenses. The TC-20E III is constructed of 7 elements in 5 groups and with Nikon's Integrated Coating (IC) you will see improved color and reduced flare. It has one aspherical lens element which virtually eliminates lens aberrations.

The AF-S Teleconverter TC-20E III, is the world’s first teleconverter* to utilize an aspherical lens element (As of 10 December 2009).
An FX-format compatible teleconverter that extends the focal length of the primary lens by 2×*
The world’s first teleconverter to utilize an aspherical lens element
A new optical design that offers superior contrast and resolution
Utilization of an aspherical lens element enabled a more compact and lightweight teleconverter

* Using this teleconverter with a lens decreases the effective aperture by two stops.