Sigma 1.4x DG EX APO Teleconverter for Canon Af Cameras Sigma 1.4x DG EX APO Teleconverter for Canon Af Cameras

The Sigma 1.4x DG EX APO Tele Converter (also known as a tele-extender) will multiply
the focal length of the existing lens by 1.4x, and will cut back the amount of light
by one f/stop. For example, using a 1.4x teleconverter with a 300 mm lens will effectively
increase the focal length to 420mm. A lens set to f/2.8 will now be f/4.



Note: Sigma APO Tele Converter 1.4x and 2x are dedicated teleconverter lenses. Due
to the high optical quality of this teleconverter, this item will only fit and work
with a select list of lenses.



The DG denotes added coating that achieves the best color balance while cutting
down on ghosting caused by reflections from the digital image sensor.