The Sigma 2x EX DG APO Teleconverter for Canon AF Lenses (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 Sigma 2x EX DG APO Teleconverter for Canon 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.
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 an added coating that achieves the best color balance while cutting down on ghosting caused by reflections from the digital image sensor.
|Attaching the APO Tele Converter to the Lens|
|Lens Construction||6 elements in 5 groups|
|Focal length||2x that of a master lens|
|Aperture coupling range||F2.8 – F32|
|Reproduction ratio||2x that of a master lens|
|Dimensions||68.5 X 52mm
(2.7in. X 2.05in.)