The Petri Half 7 is a half-frame 35mm viewfinder camera produced by Kuribayashi (later Petri) in 1962. The price was 8,800 yen (about $25). It has a circular winding knob at the bottom of the camera. The lens is a ƒ/2.8 28 mm ( Tessar type), the selenium EE shutter is Petri S program shutter with B ...