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The Pentax Spotmatic refers to a family of 35mm single-lens reflex cameras manufactured by the Asahi Optical Co. Ltd., later known as Pentax Corporation, between 1964 and 1976. All Pentax Spotmatics used the M42 screw-thread lens mount which was developed after World War II by Zeiss and Praktica .
The Pentax and its later development and likewise classic 1964 Pentax Spotmatic spurred the development of Asahi into a photographic multinational company, eventually renaming itself "Pentax" after its seminal product. The Pentax series remains pivotal in the development of modern SLR photography.
Asahi Pentax Spotmatic ES 2 (1973) — also sold as the Honeywell Pentax Spotmatic ES 2; Pentax K mount. Cameras using the Pentax K lens mount. K series. Pentax K2 ...
The bar on Pentax Spotmatic cameras is operated by spring pressure with timing linked to the shutter, but these cameras also had a separate switch for the light meter circuit which closed the aperture and gave the depth of field preview in this way. To allow auto lenses to be used on earlier cameras without the bar, many lenses were provided ...
Pentax was the first manufacturer to show a prototype camera with a behind-the-lens spot metering CdS meter system in 1961, the Pentax Spotmatic. Production Spotmatics, however, didn't appear until mid-to-late 1964, and these models were featured with an averaging meter system.
The Asahi Pentax Electro Spotmatic (Honeywell Pentax Spotmatic ES in the USA) of 1971 was the first 35 mm SLR with electronic aperture priority autoexposure and the Pentax ME was the first electronic autoexposure-only 35 mm SLR. Asahi Optical was also the first company to offer publicly available anti-reflection multicoated photographic lenses ...
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