This Linhof Technorama Optical Viewfinder is the dedicated viewfinder for the Technorama Super Angulon XL 58mm f/5.6 and Apo-Symmar L 120mm f/5.6 lenses for the 612 pc II body, with brightline frames showing the built-in vertical shift that's part of this system camera. A reflected spirit level is visible in the finder to help control the orientation of the film plane to avoid converging lines. Also visible in the viewfinder are bright lines for parallax corrections, close-up photos, and a reference mark to check horizontal and vertical orientation. The viewfinder is detachable for use in framing off the camera.