Just for comparison, here are some promo pics I scanned in from the 1981 Raiders Storybook and Raiders Book and Record. These are vintage, non-digital publications. All of these are posed stills taken during production. They use different film stock and lenses. You can see they are processed much brighter and possibly with slightly different lighting than the actual 35mm.
Taking these posed stills was a part of the moviemaking process back then. Today on set still photos are more focused on capturing behind the scenes shots, because publicity shots can be pulled from the actual digital movie master.
