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我国在七八十年代生产的单镜头反光照相机都没有内测光系统，这种相机在彩色摄影普及的今天已经落伍了，然而它们所特有的耐用性及镜头质量还是给人们留下了很多怀念。由于这种照相机的生产时间较长，所以数量很大，现在很多年龄稍大一点的摄影爱好者手中都有这种照相机。如果
China’s single-lens reflex cameras produced in the seventies and eighties do not have a closed-end photometric system. Such cameras are outdated in today’s popularization of color photography. However, their unique durability and lens quality still give people a lot of memories . Because of the long production times of such cameras, the camera is so large that many older photographers now have it. in case