单镜头反光照相机可以交换镜头是其最大的优势，其交换卡口不仅是其技术特征的体现，对于现代相机（尤其是目前高技术的ＡＦＳＬＲ机型），亦是技术进步的重要体现。现代社会是一个分工与合作的社会，摄影器材也不例外。照相机品牌众多，机型各异，客观上要求交换卡口的统... Single-lens reflex camera interchangeable lens is its greatest advantage, the exchange bayonet not only reflects the technical characteristics of the modern camera (especially the current high-tech AFSLR models), but also an important manifestation of technological progress. Modern society is a society of division of labor and cooperation, and photographic equipment is no exception. Many camera brands, different models, the objective requirements of the exchange bayonet system.