Before revision: At periapsis altitude of 75 nautical miles , the main camera imaged a 6.3 km wide ground swath on a wide moving portion of film through a small slit aperture, resulting in an image scale of 28 meter / millimeter.
After revision: At periapsis altitude of , the main camera imaged a 6.3 km wide ground swath on a wide moving portion of film through a small slit aperture, resulting in an image scale of 28 meter / millimeter.