All films of the Star Wars series were mostly filmed with an aspect ratio of 2.39:1 in mind. The original and sequel trilogies were filmed with anamorphic lenses. Episodes IV, V, VII, and VIII were filmed in Panavision, while Episode VI was filmed in Joe Dunton Camera (JDC) scope.
https://en.wikipedia.org/wiki/List_of_Star_Wars_films_and_television_series

