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Ruo Optik Kino 50/2.5: A Forgotten German Lens with Timeless Character

Among the countless lenses produced during the golden age of German optical engineering, some names have almost disappeared into history. Ruo Optik is one of them. The company, officially known as Optische Werke Rüdersdorf, was a small but ambitious German optical manufacturer founded around 1919–1922. … Continue readingRuo Optik Kino 50/2.5: A Forgotten German Lens with Timeless Character