The argus 40 is a twin lens reflex style 620 film camera made from 1950 to 1954. Focus is achieved by estimating your distance from subject and turning the ring at the very front of the lens to set the distance. F-stops and shutter speeds are set on the back ring of the lens mount. It's an excellent camera for TtV (through the viewfinder) photography Antique Cameras, Old Cameras, Vintage Cameras, Camera Nikon, Camera Gear, Film Camera, Still Photography, Photography Camera, Cardboard Camera