 This was Disneys first feature in CinemaScope and one of the first  productions outside of 20th Century Fox to sign up for CinemaScope.  The CinemaScope lens had to be leased from Fox. At the time, Bausch  & Lomb had not been able to manufacture enough anamorphic lenses to  meet demand. Only one CinemaScope lens was available to Disney. This  prevented multiple units from shooting at the same time which  contributed to the lengthy production schedule.