I have used the 70mm version. The major news networks also used them when I was at Cape Canaveral in the early 60s. I posted onr 70 mm frame of an Atlas launch that I had been given from a large roll of color neg.
I remember having the lens taped over with gaffers tape when we found an unathorized camera placed on a mount in the elevator to the gantry during John Glenn's launch. I was technically authorized to confiscate it. Gee, if I had, maybe I could have had a lot of time to play with it as it would have then become ours unless the newsies payed a stiff fine. As it is, all they had to do was unstick the gaffers tape and suffer lost shots.
It is a fine camera.
PE