The Pentax K1000 (Asahi Pentax K1000) is an interchangeable lens 35 mm SLR camera manufactured by Asahi Optical Co., Ltd. from 1976 to 1997. The K1000’s extraordinary longevity makes it a historically significant camera. It is the simplest member of Pentax K-series 35mm SLRs. K-series all have the same basic body design, but with differing feature levels, electronics, and controls. It is completely a manual camera. It can operate without batteries. Batteries are only required for the light metering information in the viewfinder. It lacks the self-timer, depth of field preview, film reminder dial, and the FP flash socket.
Lens: SMC Pentax 50 mm f/2. Lens mount: Pentax K bayonet mount. Focus: Manual focus. Exposure: manual exposure set and built-in cadmium sulfide (CdS) light meter. Shutter: horizontally traveling, rubberized silk focal plane shutter with a speed range of 1/1000 second to 1 second, along with Bulb and a flash X-sync of 1/60 second. Viewfinder: eye-level SLR pentaprism, needle index of exposure meter visible in it. ASA range: 20–3200. Flash: Hot shoe.