When Benson is on a tour of the prison during his first day as the new captain, he climbs up into a tall guard tower. From the tower's windows, the prisoners can be seen far below. But when Benson looks through binoculars, the view is from ground level.
The film, set in the 1920's , shows air holes drilled in the cell doors, something that was only done in Folsom in the 1940's.