The fuji 14x tc wr teleconverter is capable of multiplying the focal length of compatible lenses by 14x when mounted the teleconverter increases the lens aperture by one f stop however its sophisticated optical design constructed of 7 elements in 3 groups maintains the optical performance of the original lens additionally thanks to the unified design when mounted to a compatible lens1 the teleconverter is weather and dust resistant and operates at temperatures as low as 10degc this