This is the Asahi Pentax, the very first 35mm SLR produced by the Asahi Optical Company of Japan to use a pentaprism viewfinder.  The camera is often referred to as the Pentax AP by collectors even though that was never officially documented.  The other camera is the Asahi Pentax K, … Continue reading Asahi Pentax and Pentax K (1957 – 1958)