Nikon AF-S Teleconverter TC-20E III 2× Aspherical 
 
Double your focal length with pro-grade sharpness
The Nikon AF-S TC-20E III is a professional 2× teleconverter designed to extend the reach of your NIKKOR telephoto lenses. With an advanced aspherical element, it minimizes aberrations and preserves image quality—turning a 300mm f/2.8 into a powerful 600mm f/5.6, or a 70–200mm f/2.8 into a versatile 140–400mm f/5.6. Ideal for sports, wildlife, and field photography where extra reach is essential without sacrificing sharpness.
 
Condition: Excellent overall. Lens elements are clean and free of scratches, haze, or fungus. Body shows minimal cosmetic handling wear. Fully tested—autofocus and electronic contacts work properly.
Note: Front lens cap is not included. 
 
Features:
Magnification: 2.0× (doubles effective focal length)
Optical design: 7 elements in 5 groups, including 1 aspherical element
Compatible with select Nikon AF-S and AF-I telephoto lenses (f/2.8 primes, 70–200mm f/2.8, etc.)
Maintains full AF with f/2.8 lenses (becomes f/5.6 with 2×)
Advanced coatings reduce ghosting and flare
Durable Nikon build with weather sealing
 
FAQ:
Q: Will this work with my 70–200mm f/2.8?
A: Yes—it will convert it into a 140–400mm f/5.6 while maintaining AF.
Q: Does it work with slower lenses (f/4, f/5.6)?
A: It can be mounted, but AF may be lost if the max aperture exceeds f/5.6 (depending on the camera body).
Q: Is this the newest version?
A: Yes—the TC-20E III is the current model with improved optics vs. earlier versions.