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Later models Spotmatic F, Electro Spotmatic, ES, and ESII were capable of open-aperture metering when used with Super Multi Coated (S-M-C) Takumar lenses with an aperture coupling prong in the lens mount. Honeywell was the U.S. importer of the Spotmatic. Cameras officially imported by Honeywell were labeled Honeywell Pentax, instead of Asahi ...
What set these cameras apart from earlier Pentax ones was the replacement of the M42 "universal" screw-lens mount with a proprietary bayonet mount system, known as the K mount. Still the basis for Pentax lenses and cameras today, the K mount offered greater convenience and enabled the production of faster lenses such as the 50 mm f /1.2. [17]
The Pentax 6×7, designated product model number 400 xxxx by Asahi Pentax, is similar to any traditional 35 mm SLR camera except in size. The Pentax 6×7 is an electromechanical design and shares much in concept with its smaller 135 format cousin the "Pentax Electro Spotmatic", however, is not equipped with an internal meter.
Asahi Pentax S1/H1 (1961) — also sold as the Honeywell Pentax H1/Honeywell Heiland Pentax H1; Asahi Pentax SV/H3v (1963) — also sold as the Honeywell Pentax H3v; Asahi Pentax S1a/H1a (1963) — also sold as the Honeywell Pentax H1a/Honeywell Heiland Pentax H1a; Pentax Spotmatic (1964) — also sold as Honeywell Pentax Spotmatic
Asahi Optical was an early and enthusiastic participant in this competition. 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 ...
Honeywell also developed the Wagtail missile with the USAF. A Honeywell-Pentax-Spotmatic. From the 1950s until the mid-1970s, Honeywell was the United States' importer of Japanese company Asahi Optical's Pentax cameras and photographic equipment. [12]: 153 These products were labeled "Heiland Pentax" and "Honeywell Pentax" in the U.S. In 1953 ...
The camera used Nikon 'S' type rangefinder lenses. [1] The Japanese company Pentax was the first manufacturer to show an early prototype 35 mm behind-the-lens metering SLR camera, which was named the Pentax Spotmatic. The camera was shown at the 1960 photokina show.
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 ...
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