Medium format Any camera that uses 120 size roll film is considered to be medium format. This film is 6-cm wide and yields images that can be from 6 cm x 6 cm to 6 cm x 9 cm. The format is between 35 mm and 4 x 5 inches in size. Black and white and color negative films are called negative films. The negative image is reserved.
Whites are black and blacks are white.
When printed, a positive image results with whites being white and blacks being black. And colors are correctly imaged when printed. Oblique photographs These photographs are neither perpendicular nor parallel to a given line or surface. This occurs mainly with range finder and twin lens reflex cameras. The distance between the center of the lens and the viewfinder causes parallax.