Difference between revisions of "Ohca"

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* {{Zukan}} Item 1149–50.
 
* {{Zukan}} Item 1149–50.
 
* Tanaka Masao (田中政雄). "Konica history 5. Shōwa 8-nen – 20-nen." (Konica history 5. 昭和8年–20年. From Shōwa year 8 (1933) to Shōwa year 20 (1945).) {{KKS010}} Pp.40–4.
 
* Tanaka Masao (田中政雄). "Konica history 5. Shōwa 8-nen – 20-nen." (Konica history 5. 昭和8年–20年. From Shōwa year 8 (1933) to Shōwa year 20 (1945).) {{KKS010}} Pp.40–4.
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== Links ==
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In Japanese:
 +
* [http://asacame.fc2web.com/htmfolding/ohca.htm Ohca] at [http://asacame.fc2web.com/ Asacame]
  
 
[[Category: Japanese 6.5x9 folding]]
 
[[Category: Japanese 6.5x9 folding]]
 
[[Category: O]]
 
[[Category: O]]

Revision as of 11:41, 14 January 2008

Japanese plate cameras
Monocular cameras (edit)
No.0 (4×5cm) Secrette
atom (4.5×6cm) New Argus | Egorette | Secrette
Box cameras (edit)
No.0 (4×5cm) Adam | Hayatori Renshūyō
atom (4.5×6cm) Atom Hayatori Shashinki
meishi (5.5×8cm) Cherry
tefuda (8×10.5cm) Champion | Cherry | Sakura Army | Sakura Honor | Sakura Navy
nimaigake (8×12cm) Sakura Honor
kabine (12×16.5cm) Sakura Honor
Folding bed cameras (edit)
No.0 (4×5cm) Alpha | Sweet | Pony Sweet | Taishō-shiki
atom (4.5×6cm) Monarch | Need | Palma
meishi (5.5×8cm) Eagle | Idea A | Idea B | Idea Snap | Idea No.1 | Iris | Lily (horizontal) | Pearl No.3 | Special Camera | Venis | X
daimeishi (6.5×9cm) Apollo | Arcadia | Crite | Special East | Eaton | Elliotte | First | First Etui | Gold | Happy | Hope | Idea No.1 | Idea (metal) | Kinka | Kokka | Lily (horizontal) | Lily (metal) | Tropical Lily | Lloyd | Lomax | Masnette | Mikuni | Need | Nifca Klapp | Nifca Sport | Ohca | Palma | Peter | Prince | Prince Peerless | Proud | Romax | Rosen | Rubies | Sirius | Sun | Super | Tokiwa | Venus | Weha Idea | Weha Light
tefuda (8×10.5cm) Eagle | Idea A | Idea B | Idea No.1 | Idea (metal) | Iris | Lily (original) | Lily (horizontal) | Lily (metal) | Palma | Pearl No.3, No.4 | Minimum Pearl | Special Pearl | Sakura Palace | Sakura Pocket Prano | Star | Tokiwa | Weha
nimaigake (8×12cm) Eagle | Idea | Idea Binocular | Sakura Prano | Sakura Binocular Prano | Star Premo
hagaki (8×14cm) Eagle | Noble | Pearl No.3, No.4 | Star
kabine (12×16.5cm) Idea | Noble | Sakura Prano | Star Premo
Strut-folding cameras (edit)
No.0 (4×5cm) CH
atom (4.5×6cm) Idea Spring
meishi (5.5×8cm) Minimum Idea | Korok
daimeishi (6.5×9cm) Idea Spring | Minolta | Auto Minolta | Auto Press Minolta | Nifca-Dox | Vester Klapp
tefuda (8×10.5cm) Focal Happy | Idea Spring | Idea Telephoto
10×15cm Kongo Press
kabine (12×16.5cm) Idea Spring | Idea Telephoto
SLR cameras (edit)
atom (4.5×6cm) Simplex Reflex | Speed Reflex
meishi (5.5×8cm) Speed Reflex
daimeishi (6.5×9cm) Convex Reflex | Hogo Reflex | Idea Reflex (1932) | Neat Reflex | Simplex Reflex | Speed Reflex
tefuda (8×10.5cm) Idea Reflex (1910 and 1911) | Idea Reflex (1932) | Neat Reflex | Photo Deluxe Reflex | Speed Reflex
nimaigake (8×12cm) Idea Reflex (1910 and 1911) | Sakura Reflex Prano
kabine (12×16.5cm) Idea Reflex (1910 and 1911)
daikabine (13×18cm) Guaranteed Reflex
unknown Hardflex | Leinflex | Photoman Special Reflex
Stereo cameras
3.7×5cm Tokioscope
4×5in Idea Binocular | Sakura Binocular Prano
Japanese 3×4 and 4×4, 4×5 and 4×6.5, 4.5×6, 6×6 and 6×9 ->

The Ohca is a Japanese 6.5×9cm plate folder made from 1935 by Rokuoh-sha, the manufacturing department of Konishiroku. The name is often spelled "Ohka" by mistake, but the markings on the camera read Ohca.

Description

The Ohca has a metal body, similar to that of the Idea. It is easily distinguished by its focusing worm screw on the photographer's right. The bellows has true double extension. The distance scale is on the left of the focus rails, and there is sometimes a depth-of-field table on the camera's left side. There is brilliant finder atop the front standard, and a wireframe finder on the left. The camera has limited vertical movement ability. The name Ohca is inscribed on an oval plate riveted inside the folding bed between the focus rails.

Lens and shutter

The Ohca was normally offered with either an Apus (T, B, 25–100) or a Durax (T, B, 1–125) dial-set shutter, and a Rokuoh-sha Optor Anastigmat lens in either f/6.3 or f/4.5 aperture.[1] Surviving examples are confirmed with the Optor f/6.3 and the Apus or Durax.[2] The depth-of-field table on the side has the lens name Optor Anas't 10.5c.m and the word 焦点震度表 (meaning "depth-of-field table"). Another example is known with a Durax shutter and a Rodenstock Trinar-Anastigmat f/4.5 lens; it has no depth-of-field table.[3]

Commercial life

The Ohca was featured in the December 1935 issue of Asahi Camera and was advertised from November of the same year.[4] The September 1936 advertisement in Ars Camera gives the price of ¥32 with an f/6.3 lens and ¥37 with an f/4.5.[5] The last reported advertisement is dated May 1939.[6] The official list of set prices compiled in October 1940 and published in January 1941 still has an Ohca I (¥43), Ohca II (¥52) and Ohca III (¥54), with no further detail.[7]

Notes

  1. Kokusan kamera no rekishi, p.334.
  2. Apus, Optor f/6.3: example pictured in Sugiyama, item 1149, and example observed in an online auction. Durax, Optor f/6.3: example pictured in Tanaka, p.41 of Kurashikku Kamera Senka no.10.
  3. Example pictured in Sugiyama, item 1150.
  4. Kokusan kamera no rekishi, p.334.
  5. Advertisement reproduced in Kokusan kamera no rekishi, p.60.
  6. Kokusan kamera no rekishi, p.334.
  7. "Kokusan shashinki no kōtei kakaku", type 8, sections 1, 2 and 4A.

Bibliography

Links

In Japanese: