Canon FDn 1200 f/5.6L 1.4x
We posted about the FDn 1200 f/5.6L 1.4x lens, which was the first Canon lens to have a built in teleconverter. I was having a hard time find a photograph of one, and apparently only 5 of these lenses were ever made and never went to production.
Thankfully, Phil from Australia scanned and sent us some images of said lens in action. These images are from the Easter Bike Races in Bathurst, Australia. Canon Australia had one ”on loan for a few years”, until EOS was launched in 1987 and these lenses became EF mount without the 1.4 teleconverter.