Canon extender FD2 x typeA

Extenders are small auxiliary lenses that can quickly convert the focal lengths of your interchangeable lenses by mounting them through the lens mount between an attached primary lens and the camera body.
The FD 2X-A Extender doubles the focal length of the prime lens and is designed for use with any lens with a focal length of 300mm or longer, including zooms with 300mm within their range. Using the FD 2X-A converts the 880mm lens to 1600mm, while maintaining a minimum shooting distance of 14m.
In leather case and original box.
Serial number 31515