Nikon tc 20e iii 2x teleconverter

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Nikon TC-20E III 2x Teleconverter

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The Nikon TC-20E III 2x Teleconverter

This is the third version of Nikon’s 2x autofocus teleconverter, increasing focal length by 2x and reducing aperture by two f-stops. It maintains autofocus with all Nikon digital cameras. The version III contains an aspheric element that is claimed to provide superior image quality.

Roger's Take

The 1.4X is the teleconverter I recommend with few reservations. You can use it with any of the lenses above and have just a little deterioration in image quality (and of course give up 1 stop of light). The 2X converter I really recommend only on the f/2.8 telephoto primes and the 200mm f/2.0 lens. You can certainly use it on some of the others (although autofocus may be impaired or not work at all depending on the camera you’re shooting). The 1.7X is the compromise. You lose 1.5 stops of aperture and give up some image quality, although not a huge amount.

Remember, too, that a teleconverter gives you a double whammy: your exposure time and the focal length of the lens are both increased. This makes technical issues more likely so a sturdy tripod, mirror lock up, etc. are often critical to getting sharp images.

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