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03-02-2010, 12:40 PM   #1
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In the beginning........

Can anybody help me decide on a proper forum to add this to?


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Type: 35 mm SLR camera

Lens mount: Interchangeable screw mount
Focus: manual
Exposure: manual
Flash: hot shoe

The Asahiflex was a 35mm single-lens reflex camera built by the Asahi Optical Corporation (later to become Pentax). It was the first SLR camera built in Japan.
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. 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.
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.
With the IIB a key advance was made - the quick-return mirror. 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
58mm f/2.4 Asahiflex IIA
Top view: Asahiflex IIA #79346
• Asahiflex I (1952 - 1953)
• Asahiflex IA (1953 - 1954)
• Asahiflex IIB (1954 - 1956)
• Asahiflex IIA (1955 - 1957)

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03-02-2010, 06:21 PM   #2
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You could submit it as an article for the article section since we do not (yet) have a review sectin covering those oldies!

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03-08-2010, 09:39 PM   #3
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Thank you Ole

I just sent the "article" over to Pentax Articles.
I'm fascinated with the history and evolvement of cameras and lenses. There is a lot of really cool stuff out there to be found about Asahi/Pentax and I don't even have to leave the house thanks to the internet! My wife and I still spend a lot of time at the Library though, because we are both curious people. (did that come out right?)
03-08-2010, 09:41 PM   #4
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You should leave the house to better experience the brand

08-13-2010, 06:03 PM   #5
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I know...

Actually, they do let me out once in awhile. At least long enough to pick up a Pentax K10D. Now they can't get me to come back in!

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