Canon FD Mount Vivitar Auto Tele Converter 2X with Caps for Canon Fd Mount Camera (AE-1 A-1, Etc.)
Here we have a Vivitar produced Canon FD mount Automatic Tele Converter X2 for Canon SLR cameras. It is in excellent condition and includes both caps.
This tele converter will effectively double the focal range of any Canon FD lens. Multiplying the focal length by a factor of two will essentially turn your 50mm lens into a 100mm lens, your 28mm lens into a 56mm lens, etc.
The teleconverter will be carefully packaged and shipped immediately.