Stanley A. Long was an English exploitation cinema and sexploitation filmmaker. He was also a driving force behind the VistaScreen stereoscopic (3D) photographic company. He was a writer, cinematographer, editor, and eventually, producer/director of low-budget exploitation movies.

The VistaScreen Co Ltd was a stereographic photography outfit launched in the late 1950s by Jack Spring & Jeffrey Leigh, who, at the time, owned a paper merchanting company called Capital Paper Company, and Stanley Long, a former RAF photographer. Long shot the vast majority of the stereo images, mostly using a 1920s Franke & Heidecke Heidoscop stereo camera with a 6x13 cm plate back. The VistaScreen viewers were manufactured in ivory-colored plastic and were designed to fold flat in order to be able to be compactly stored.