The Nikon TC-14B 1.4x teleconverter (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 300mm lens will effectively increase the focal length to approximately 450mm. A lens set to f/2.8 will now be f/4.
Teleconverters are best used with longer telephoto lenses and are not recommended for lenses wider than 50mm, e.g. 28-105mm.
NOTE: Due to the high-quality design of this converter (5 elements/5 groups), the teleconverter will only fit and work with a select range of lenses. However, even with AF lenses, only manual focusing is possible. Only the following lenses are compatible:
AF lenses, in manual focus mode:
MF Manual Focus lenses:
| Magnification | 1.4x |
| Lens Elements/Groups | 5/5 |
| Length | 1.3" (3.3 cm) |
| Diameter | 2.6" (6.6 cm) |
| Weight | 5.8 oz (165 g) |