Popular Photography magazine posted some pictures on their Instagram of a new Canon EF 600mm f/4 DO BR lens prototype (patent was recently filed in Japan) that is currently on display at the 2015 Canon EXPO in NYC:
This is a semi-working version of the new 600mm BR DO lens on the floor at the #CanonExpoNY love seeing products still in development A photo posted by Popular Photography (@popphotomag) on
There was also a prototype of the new 120MP Canon EOS DSLE camera that was announced few days ago:
Via Canonrumors