Sigma 2x EX DG APO Teleconverter for Canon
The Sigma 2x EX APO Tele Converter (also known as a tele-extender) will multiply the focal length of the existing lens by 2x and will cut back the amount of light by 2 f/stops. For example using a 2x teleconverter with a 300 mm lens will effectively increase the focal length to 600 mm. A lens set to f/2.8 will now be f/5.6. Due to the high optical quality of this teleconverter, this item will only fit and work with a select list of lenses. Please check the Sigma Teleconverter matching list before placing your order.
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