大正和昭和初期,日本军用光学器材如炮队镜、火炮瞄准镜、测距仪多由德国引进,然后小修小改地进行仿制。在照相机方面,日本也是崇尚德国的产品。1930-1940年代,德国照相机以优质的镜头和精良的机械性能引领世界相机的潮流。抗日战争时期,侵华日军,特别是随军的日本记者使用的大多是德国 In the early days of Taisho and Showa era, Japan’s military optical equipment such as artillery gun, artillery sight, range finder were mostly introduced from Germany, and then made minor changes. In the camera, Japan is also advocating Germany’s products. From the 1930s to the 1940s, German cameras led the world in trendy cameras with excellent lenses and sophisticated mechanical properties. During the period of the Anti-Japanese War, the Japanese reporters who invaded China, especially with the army, mostly used Germany