The high-performance teleconverter is capable of multiplying the focal length of mounted lenses*1 by two. It features excellent optical design with a construction of 9 elements in 5 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°C. This makes it possible to be used with confidence outdoors when used with the weather and dust-resistant X-T1 and X-Pro2 camera bodies, and the XF50-140mmF2.8 R LM OIS WR and XF100-400mmF4.5-5.6 R LM OIS WR lenses.
*1 Compatible lens (As of May 19, 2016)
XF50-140mmF2.8 R LM OIS WR ⇒ 100-280mmF5.6 with teleconverter mounted (Equivalent to 152-427mm on a 35mm format)
XF100-400mmF4.5-5.6 R LM OIS WR ⇒ 200-800mmF9-11 with teleconverter mounted (Equivalent to 305-1,219mm on a 35mm format)