This accessory increases the focal length of your lens by 1.94 times (equal to a 177 mm telephoto lens) without changing its F-stop value. Use the ada

This accessory increases the focal length of your lens by 1.94 times (equal to a 177 mm telephoto lens) without changing its F-stop value. Use the adapter ring AR-FXE01 (sold separately) when the teleconversion lens is mounted on the lens.