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The 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, e.g. 28-105mm.
However, full AF operation is only possible with lenses with open aperture of
f/2.8 or brighter. Please be aware that AF will work properly only if there is
enough light and contrast on the subject to activate the camera's AF sensors.
Manual focusing is recommended when using lenses with smaller open f-stop value
than those given above.
| Model | 122/220 series |
| Lens Construction (Groups/Elements) |
4/4 |
| Coating | Multicoated |
| Maximum Magnification | 2X the mag ratio of original lens |
| Filter Diameter | --- |
| Length | 1.0in. (26mm) |
| Maximum Barrel Diameter | Ø2.6in. (66.7mm) |
| Accessory | Case |
| Mount | Canon, Minolta, Nikon, Pentax |
| Weight | 185g / 6.5 oz. |
| Dimensions | 43.5mm / 1.7 in. X 68.5mm / 2.7 in. |
