The Kenko MC4 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 300mm lens will effectively increase the focal length to 600mm. 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.
| Magnification | 2x |
| Lens Construction | 4 elements |
| Length | 1" (25mm) |
| Diameter | 2.6" (67.4mm) |
| Weight | 6 oz (170 g) |
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Comments about Kenko 2x AF Teleplus DG MC4 Autofocus Teleconverter for Nikon AF:
Even in bright light, does not allow lens to hold focus.
Auto focus with this device is almost useless.
Pros
Cons
Best Uses
Comments about Kenko 2x AF Teleplus DG MC4 Autofocus Teleconverter for Nikon AF:
I like this teleconverter very much, It is just what i wanted in a 2X lens.
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