Vintage Vivitar Automatic 3X-7 Tele Converter for Konica Camera--NEW

The Vivitar Automatic 3X-7 Tele Converter is a precision optical component effectively tripling the focal length of the lens it is used with. For example using a 3X tele converter with a 100mm lens will effectively increase the focal length to 300mm. The lens is new and comes with a custom Vivitar case which is also new.