Sigma Teleconverters
TELE converters dedicated to the APO 70-200mm f/2.8 EX and the APO 300mm f/2.8 EX lenses increase the focal length by at least 1.4 times. The TELE converters provide a larger focal length and allow greater mobility, which is useful for taking photographs of sport, nature and landscapes.
from £214.99
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Sigma 1.4x APO EX DG Tele Converter
The 1.4 EX is placed between the lens and the camera, and 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; the high optical performance is maintained and the AF speed is not affected.SAVE £25.00 (RRP £239.99)
from £259.99
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Sigma 2x APO EX DG Tele Converter
The 2x EX is placed in the same way and it 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 lens.SAVE £30.00 (RRP £289.99)