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Haruki Studio (春木スタジオ) was a Japanese company active in 1949, located in Tokyo, Chūō-ku Nihonbashi Hongoku-chō 1–3 (東京都中央区日本橋本石町1ノ3).[1] It made the Baron adapter (バロン・アダプター) to use 35mm film in 6×6 TLR cameras. The February 1949 advertisement in Ars Camera mentions the following features:[1]

  • auto-stop film advance via a sprocket shaft;
  • takes 40 exposures in 24×32mm format;
  • preserves the film-to-flange distance for correct focusing;
  • allows daylight loading;
  • needs no modification of the camera itself.


  1. 1.0 1.1 Advertisement in Ars Camera February 1949, p.49.


  • Ars Camera. Advertisement by Haruki Studio in February 1949 (p.49).