The CPC 2x teleconverter (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.
Teleconverters are not recommended for lenses wider than 50mm.
| Magnification | 2x |
| Lens Elements/Groups | 4/4 |
| Length | .97" (25mm) |
| Diameter | 2.6" (66.mm) |
| Weight | 3.2 oz (92 g) |