海鸥ＤＦ－２００型单镜头反光照相机孙逸馨海鸥ＤＦ－２００是上海照相机总厂新近开发成功的一种新款式电测光单镜头反光照相机。该机采用优化设计技术，造型流畅舒适，独具的多重曝光功能在国内同类相机中为首创。由于采用了纵走式机械钢片快门，与通常的横走式快门相比... Seagull DF-200 single-lens reflex camera Sun Yat-sen Seagull DF-200 is a new type of electrophotographic single-lens reflex camera recently developed by Shanghai Camera Factory. The machine uses optimized design technology, modeling smooth and comfortable, unique multiple exposure function in the country for the first of its kind. As a result of longitudinal mechanical steel shutter, compared with the usual horizontal shutter ...