Rüdersdorf

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Rüdersdorf was a German optical company located in Berlin in the 1920s,[1] which used the trademark Rüo for a number of lenses. The company was founded in Bremen in 1919 or 1920, manufacturing the Rüo-Optik and the Rüo-Tele-Anastigmat, based on work by Hugo Hahn[2] It was floated as the public company Optische Werke AG, Bremen in January 1922 in Bremen. On 3 March 1922 it was renamed Optische Werke Rüdersdorf A.G. and moved to Berlin.[3] The public company ceased production in February 1926 and ceased to exist in 1932. Production of lenses was carried on by Rüo Optik GmbH.[4]

Its lenses are marked "Opt-Werke Rüdersdorf-Berlin". They were distributed in Japan by J Tusashi & Co, Tokyo.[5]

On record are the following lenses:[6]

  • Acomar 18cm f/4.5[7]
  • Caleinar 2.5cm f/2[8]
  • Caleinar 1.8cm f/1.5[9]
  • Paritar 1cm f/1[10]
  • Rüo Anastigmat Rapidor 150mm f/4.5[11]
  • Rüo Dopp[el]-Anastigmat Iricentor 18cm f/6.8[12]
  • Rüo Kino 50mm f/3.5 [13]
  • Rüo Optik (a prism lens)[14]
  • Rüo-Tele-Anastigmat 25cm f/2[15]


Notes and References

Patents

  • Lichtbildlinse. German Patent Application nº O 0012855 of 22 March 1922, issued on 29.09.1923 to Optische Werke Rüdersdorf G.m.b.H. and Hugo Hahn. (Patent Document)
  • Sphaerisch, chromatisch und astigmatisch korrigiertes photographisches Objektiv. German Patent Application nº O 0014788 of 7 March 1925, issued on 14 June 1928 to Rüo Optik G.m.b.H and Hugo Hahn (Patent Document)

Bibliography

  • Yazawa Seiichirō (矢沢征一郎). "Raika-yō kawaridane kōkan-renzu" (ライカ用変り種交換レンズ, A singular interchangeable lens in Leica mount). In Camera Collectors' News no.46 (April 1981). Nishinomiya: Camera Collectors News-sha. Pp.5–8.
  • K.P. Neugebauer & P.Barz. 'Optische Werke Rüdersdorf AG – Rüo Optik GmbH' Photographica Cabinett nº 54 (December 2011), pp. ¶¶ [not seen].

Endnotes

  1. Optische Werke Rüdersdorf A.G., Berlin
  2. Who later on was on the board of directors.
  3. The company was placed under administration in November 1925, continued normal trading in February 1926.
  4. Freunde Historischer Wertpapiere (Share Certificate); Freunde Historischer Wertpapiere (Share Certificate 2)
  5. Catalogue seen in a on-line auction.
  6. This list cannot be regarded as exhaustive.
  7. Ruo Anastigmat Acomar 18cm f/4.5 at ksmt.com.
  8. APUG forum.
  9. APUG forum.
  10. APUG forum.
  11. Seen in an online auction.
  12. APUG forum.
  13. Kineres camera.
  14. Lichtbildlinse. German Patent Application nº O 0012855 of 22 March 1922, issued on 29.09.1923 to Optische Werke Rüdersdorf G.m.b.H. and Hugo Hahn. Patent Document (pdf)
  15. APUG forum.
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