在单反相机上实施自动聚焦,人们从上世纪中叶就开始了努力,有案可查的是徕兹公司从1960年到1973年有数篇专利问世,在1976年PHOTOKINA上徕兹展示了自动聚焦的研究成果,1978年徕兹展示了一个完整的自动聚焦单反相机系统雏形。第一个大量生产自动聚焦单反相机是1978年的宝利来SX-70;第一个宣布35mm自动聚焦单反相机的是宾得,型号为ME-F,时间是1981年; Autofocusing on SLRs has led people to work hard since the middle of the last century. There is evidence that several patents were issued by Leeds from 1960 to 1973. At the PHOTOKINA in 1976, Leitz demonstrated autofocus Research results, in 1978, Leitz demonstrated a prototype of a complete auto-focus SLR camera system. The first mass-produced autofocus SLR was the Polaroid SX-70 in 1978; the first to feature a 35mm autofocus SLR at Pentax, model ME-F, in 1981;