Yashica Penta-J SLR w/ Yashinon 50mm f/2 and optional top-mounted meter   The Penta-J model was the initial SLR offered by Yashica after the switch in their lenses from using a proprietary bayonet to the universal M42 screw mount. [ Zeiss VS 35-70mm f/3.4 - 35mm @ f/5.6 ]