Camron 2X auto tele converter
History of technology
Photographic equipment
Wilfrid Laurier University
2 X Teleconverter made for Exakta lens.
1 photographic lens : telephoto lens
https://archives.library.torontomu.ca//camron-2x-auto-tele-converter
2005.005.2.014
Japan
Open. Records are available for consultation without restriction.