The Nikon TC-20E III 2x teleconverter arrived today for my 70-200mm f/2.8 lens. It doubles the focal length (more zoom), but also doubles the effective aperture (less light) turning it into a 140-400mm f/5.6. I’m not sure what happens to Vibration Reduction (VR) performance, but it appears to work just as affectively, i.e. about 4 […]