This Canon teleconverter with a maximum aperture of f/1.4 is a great addition to your photographic arsenal. It is compatible with Canon cameras and features both auto and manual focus modes. The mount has 46mm threads, and the focal length multiplier is 1.4x 46. The teleconverter is a fixed/prime lens type and has a focal length type of tele-converter. The item comes in its original case and is brand new, made in Japan. This teleconverter is a must-have for any photographer looking to enhance their photography game. Box has some damage (see photos)