The 2x EX allows the photographer to use the 70-200mm f/2.8 lens as a 140-400mm f/5.6 telephoto zoom lens, and the 300mm f/2.8 lens as a 600mm f/5.6 ultra telephoto.
Cosmetic design matches the latest AF-S Nikkor lenses. Increases the original focal length by 40 per cent. Reduces lens aperture by one f-stop. Autofocus possible with AF-S and AF-I Nikkor lenses.
Designed exclusively for use with AF-S and AF-I lenses, the AF-S Teleconverter TC-17E II completes the Nikon lineup of 1.4x, 1.7x and 2.0x compact teleconverters.
The 1.4 EX is placed between the lens and the camera, and it allows the photographer to use the 70-200mm f/2.8 lens as a 98-280m f/4 lens, and the 300mm f/2.8 lens as a 420mm f/4 lens.
TC-DC58D Tele Converter Lens for the Canon G10, G11 or G12 Digital Cameras. This Tele Converter requires Lens Adapter LA-DC58K to attach this lens to the camera.