The "Canon" is the "Kiev EF" (http://www.meinezersaegtenkameras.de/Ekiev%20ef.html), a Kiev with a Canon EF mount.

As for 6x12 or 6x14, the plan was to use up the image circle of the Super Angulon as much as possible, which led to the 6x14 format. In hindsight this maybe wasn't a good decision, a) because of the vignetting and b) because the format sits somewhat between "just wide" and real panoramas, neither fish nor fowl.

Regards,

Sven