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{{Infobox camera
{{Infobox camera
| camera_name = Asahiflex
| camera_name = Asahiflex
| image_name = Asahiflex IIb Model I.jpg
| image = Asahiflex IIb Model I.jpg
| type = [[35 mm]] [[SLR camera]]
| type = [[135 film|35 mm]] [[SLR camera]]
| lens_mount = Interchangeable screw mount
| lens_mount = M37 Screw Mount
| focus = manual
| focus = manual
| exposure = manual
| exposure = manual
Line 11: Line 11:
| dimensions =
| dimensions =
}}
}}
The '''Asahiflex''' was a [[135 film|35mm]] [[single-lens reflex]] [[camera]] built by the Asahi Optical Corporation (later to become [[Pentax]]). It was the first SLR camera built in [[Japan]].
The '''Asahiflex''' was a [[135 film|35 mm]] [[single-lens reflex]] [[camera]] built by the Asahi Optical Corporation (later to become [[Pentax]]).


Asahi Optical introduced its first 35 mm camera in 1952. Unlike the majority of Japanese camera manufacturers of the time, Asahi made a conscious decision not to produce a mere German rangefinder copy, a relatively simple task. Instead Asahi decided to copy the [[Praktiflex]], a 1939 design, made in the German Democratic Republic. Asahi's designers (Nobuyuki Yoshida and Ryohei Suzuki) were convinced of the inherent superiority of the SLR and so proceeded along these lines. This effort resulted in the Asahiflex I, which was also the first Japanese 35mm SLR.
Asahi Optical introduced its first 35 mm camera in 1952. Unlike the majority of Japanese camera manufacturers of the time, Asahi made a conscious decision not to produce a mere German rangefinder copy, a relatively simple task. Instead, Asahi decided to copy the [[Praktiflex]], a 1939 design, made in the German Democratic Republic. Asahi's designers (Nobuyuki Yoshida and Ryohei Suzuki) were convinced of the inherent superiority of the SLR and so proceeded along these lines. This effort resulted in the Asahiflex I, which was also the first Japanese 35 mm SLR.


==Asahiflex I==
The Asahiflex I had a non-interchangeable waist-level viewfinder, with a direct optical viewfinder for eye-level use. The Asahiflex I had a non-returning mirror (which, however, was directly coupled to the shutter button, so only when the shutter button was released the mirror returned to the down position) and shutter speeds from 1/25 to 1/500. The camera used the M37 screw mount. The Asahiflex I went through some minor modifications for flash use, resulting in the IA.
The Asahiflex I had a non-interchangeable waist-level viewfinder, with a direct optical viewfinder for eye-level use. Like the Praktiflex the Asahiflex I did not have a returning mirror (which means the mirror will only be back to its initial position to redirect light to the viewfinder for composing and range finding work after the operators had wound the film) and shutter speeds from 1/20 to 1/500 and B. The camera used the M37 screw mount. The Asahiflex I went through some minor modifications for flash use, resulting in the IA.


==Asahiflex IIB==
==Asahiflex IIB==
The Asahiflex IIB was released in 1954. With the IIB, a key advance was made, the quick-return mirror. It was the world's first SLR camera with an [[instant return mirror]].<ref>Michael R. Peres (2013), [https://books.google.co.uk/books?id=NMJxyAwGvKcC&pg=PA779 ''The Focal Encyclopedia of Photography'', page 779], [[Taylor & Francis]]</ref> The problem of mirror black-out was one of the main problems with prior SLR designs, greatly reducing usability and leading to the greater popularity of the rangefinder. With the IIB there emerged the first practical quick-return mirror, a vital innovation and one which was quickly adopted by other manufacturers. With the final model in the series, the IIA, the Asahiflex gained slow speeds from 1/25th of a second to 1/2 of a second.
The Asahiflex IIB was released in 1954. With the IIB, a key advance was made, the quick-return mirror. It was the world's first SLR camera with an [[instant return mirror]].<ref>Michael R. Peres (2013), [https://books.google.com/books?id=NMJxyAwGvKcC&pg=PA779 ''The Focal Encyclopedia of Photography'', page 779], [[Taylor & Francis]]</ref> The problem of mirror black-out was one of the main problems with prior SLR designs, greatly reducing usability and leading to the greater popularity of the rangefinder. With the IIB there emerged the first practical quick-return mirror, a vital innovation and one which was quickly adopted by other manufacturers. With the final model in the series, the IIA, the Asahiflex gained slow speeds from 1/25th of a second to 1/2 of a second.


<gallery>
<gallery>
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==Asahiflex series==
==Asahiflex series==
* '''Asahiflex I''' (1952 - 1953)
* '''Asahiflex I''' (1952–1953)
* '''Asahiflex IA''' (1953 - 1954)
* '''Asahiflex IA''' (1953–1954)
* '''Asahiflex IIB''' (1954 - 1956)
* '''Asahiflex IIB''' (1954–1956)
* '''Asahiflex IIA''' (1955 - 1957)
* '''Asahiflex IIA''' (1955–1957)


==See also==
==See also==
{{commons category|Asahiflex I}}
{{commons category}}
{{commons category|Asahiflex IIb}}
{{commons category|Asahiflex IIa}}
* [[Pentax]]
* [[Pentax]]
* [[Pentax cameras]]
* [[Pentax cameras]]
* [[History of the single-lens reflex camera]]
* [[History of the single-lens reflex camera]]


==Refeferences==
==References==
{{reflist}}2. "Asahiflex I - Pentax M37 Screwmount Slrs - Pentax Camera Reviews And Specifications". ''Pentaxforums.Com'', 2022, [https://www.pentaxforums.com/camerareviews/asahiflex-a.html. https://www.pentaxforums.com/camerareviews/asahiflex-a.html.]
{{reflist}}

[[Category:Pentax SLR cameras]]
[[Category:Pentax SLR cameras]]
[[Category:135 film cameras]]
[[Category:135 film cameras]]

Latest revision as of 01:40, 3 October 2023

Asahiflex
Overview
Type35 mm SLR camera
Lens
Lens mountM37 Screw Mount
Focusing
Focusmanual
Exposure/metering
Exposuremanual
Flash
Flashhot shoe

The Asahiflex was a 35 mm single-lens reflex camera built by the Asahi Optical Corporation (later to become Pentax).

Asahi Optical introduced its first 35 mm camera in 1952. Unlike the majority of Japanese camera manufacturers of the time, Asahi made a conscious decision not to produce a mere German rangefinder copy, a relatively simple task. Instead, Asahi decided to copy the Praktiflex, a 1939 design, made in the German Democratic Republic. Asahi's designers (Nobuyuki Yoshida and Ryohei Suzuki) were convinced of the inherent superiority of the SLR and so proceeded along these lines. This effort resulted in the Asahiflex I, which was also the first Japanese 35 mm SLR.

Asahiflex I[edit]

The Asahiflex I had a non-interchangeable waist-level viewfinder, with a direct optical viewfinder for eye-level use. Like the Praktiflex the Asahiflex I did not have a returning mirror (which means the mirror will only be back to its initial position to redirect light to the viewfinder for composing and range finding work after the operators had wound the film) and shutter speeds from 1/20 to 1/500 and B. The camera used the M37 screw mount. The Asahiflex I went through some minor modifications for flash use, resulting in the IA.

Asahiflex IIB[edit]

The Asahiflex IIB was released in 1954. With the IIB, a key advance was made, the quick-return mirror. It was the world's first SLR camera with an instant return mirror.[1] The problem of mirror black-out was one of the main problems with prior SLR designs, greatly reducing usability and leading to the greater popularity of the rangefinder. With the IIB there emerged the first practical quick-return mirror, a vital innovation and one which was quickly adopted by other manufacturers. With the final model in the series, the IIA, the Asahiflex gained slow speeds from 1/25th of a second to 1/2 of a second.

  • Top view: Asahiflex IIb Model I #72734
    Top view: Asahiflex IIb Model I #72734
  • 58mm f/2.4 Asahiflex IIA
    58mm f/2.4 Asahiflex IIA
  • Top view: Asahiflex IIA #79346
    Top view: Asahiflex IIA #79346

Asahiflex series[edit]

  • Asahiflex I (1952–1953)
  • Asahiflex IA (1953–1954)
  • Asahiflex IIB (1954–1956)
  • Asahiflex IIA (1955–1957)

See also[edit]

Wikimedia Commons has media related to Asahiflex.

References[edit]

  1. ^ Michael R. Peres (2013), The Focal Encyclopedia of Photography, page 779, Taylor & Francis

2. "Asahiflex I - Pentax M37 Screwmount Slrs - Pentax Camera Reviews And Specifications". Pentaxforums.Com, 2022, https://www.pentaxforums.com/camerareviews/asahiflex-a.html.

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