Difference between revisions of "KOO-Tiyoko"
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The '''KOO-Tiyoko''' is a leaf shutter certainly made by [[Minolta|Chiyoda Kōgaku Seikō]] (predecessor of [[Minolta]]) for military use. "Tiyoko" is an alternative writing for "Chiyoko", abbreviation of <U>Chi</U>yoda <U>Kō</U>gaku. The meaning of "KOO" is at present unclear. | The '''KOO-Tiyoko''' is a leaf shutter certainly made by [[Minolta|Chiyoda Kōgaku Seikō]] (predecessor of [[Minolta]]) for military use. "Tiyoko" is an alternative writing for "Chiyoko", abbreviation of <U>Chi</U>yoda <U>Kō</U>gaku. The meaning of "KOO" is at present unclear. | ||
| − | The KOO-Tiyoko gives only 1/100, 1/200 and 1/400 speeds, and was probably made specifically for [[Japanese aerial cameras|aerial cameras]]. It has a black front plate, with the name ''KOO–TIYOKO'' at the top and no provision for an aperture scale. | + | The KOO-Tiyoko gives only 1/100, 1/200 and 1/400 speeds, and was probably made specifically for [[Japanese aerial cameras|aerial cameras]]. It has a black front plate, with the name ''KOO–TIYOKO'' at the top and no provision for an aperture scale. Examples are known with a [[Hexar lenses|Hexar Ser.II 75mm f/3.5]], mounted on an Army Type 99 Ultra Small Aerial Camera ([[GSK-99]]).<ref> [http://www2f.biglobe.ne.jp/~ter-1212/sakura/hexarser2.htm R. Konishi website]. </ref> |
== Notes == | == Notes == | ||
Revision as of 16:11, 18 July 2010
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| A Simlar 7.5cm f/3.5 lens set in a KOO-Tiyoko shutter on a Tōkyō Kōgaku-built GSK-99. |
The KOO-Tiyoko is a leaf shutter certainly made by Chiyoda Kōgaku Seikō (predecessor of Minolta) for military use. "Tiyoko" is an alternative writing for "Chiyoko", abbreviation of Chiyoda Kōgaku. The meaning of "KOO" is at present unclear.
The KOO-Tiyoko gives only 1/100, 1/200 and 1/400 speeds, and was probably made specifically for aerial cameras. It has a black front plate, with the name KOO–TIYOKO at the top and no provision for an aperture scale. Examples are known with a Hexar Ser.II 75mm f/3.5, mounted on an Army Type 99 Ultra Small Aerial Camera (GSK-99).[1]
