在照相机制造历史上,折叠相机曾经是一个大家族,折叠式照相机结构也是相机制造史最古典的形式之一,自19世纪八、九十年代至20世纪七十年代前后曾盛极一时。经过百年来的发展,相成了皮腔伸缩折叠结构和金属、塑料材质的推拉折叠、以及齿轮伸缩折叠三大类型。如今像仙娜、林哈夫、骑士等大画幅技术相机,仍然在沿用这种折叠结构形式。 Folding cameras used to be a big family in the history of camera making. Folding camera structures are also one of the most classic forms of camera-making history, and have flourished since the 1880s and 1930s to the 1970s. After a hundred years of development, has become a bellows retractable folding structure and metal, plastic push-pull folding, and gear telescopic folding three types. Now like Xian Na, Lin Hafu, Knight and other large-format technology cameras, still follow this form of folding structure.