Manufacturer description: The Pro 300 3x is designed for use with lenses of 50mm or above and work best with telephoto lenses of 100mm to 500mm. Common magnifications are 1.4 times and 2 times, but the Kenko Teleplus Pro 300 AF converter has a 3x magnification. For example, using a 3 times (3x) teleconverter will increase the focal of 300mm lens to 900mm. Kenko does not recommend them for zoom lenses that have a range starting under 50 mm.
|Lens mount||Canon EF, Nikon F (FX)|
|Weight||194 g (0.43 lb)|
|Length||65 mm (2.56″)|