High-performance teleconverter capable of multiplying the focal length of mounted lenses*1 by 1.4x. Although the aperture becomes one f-stop higher when mounted, the teleconverter features an excellent optical design with a construction of 7 elements in 3 groups to maintain the optical performance of the original lens. Also, thanks to the unified design when mounted to a compatible lens, the teleconverter is weather and dust-resistant and operates at temperatures as low as -10℃. This makes it possible to be used with confidence outdoors when used with the weather and dust-resistant X-T1 camera body and XF50-140mmF2.8 R LM OIS WR or XF100-400mmF4.5-5.6 R LM OIS WR lens.
*1 Compatible lens (As of January, 2016) : XF50-140mmF2.8 R LM OIS WR and XF100-400mmF4.5-5.6 R LM OIS WR