Abstract: In a camera body, supporting members for rotatably supporting the end of the back lid are integrally formed with an upper cover and a lower cover on the opposed surfaces of the ends of the upper and lower covers secured to the upper portion and the lower portion, respectively, of a camera's interior body.

Abstract: The disclosure describes an indication device in viewfinder for a single lens reflex camera having an exchangeable viewfinder optical system. To improve the exchangeability of the components of the viewfinder optical system, informative members necessary for indicating the information of shutter speed, diaphragm aperture and the like are built in the camera body itself. Among the components of the viewfinder optical system, the condenser lens member and the focusing screen member is enclosed with a frame member to form an unitary viewfinder screen unit. Making use of the space in the unit, a necessary reflective member is fixed to the underside of the condenser lens member. A lighting window is formed on the frame member to direct the information coming from the informative members to the reflective member.