Minolta manufactured and marketed a line of 35mm film single lens reflex cameras (SLRs) and lenses with the Minolta SR-mount between 1958 and 1996; Minolta later introduced the Minolta A-mount system in 1985, a line of autofocus SLRs and lenses with the mechanically incompatible Minolta A-mount, which eventually supplanted the manual focus system.