以往选用单反副厂镜头的人多半都是冲着性价比而来,但是随着近年副厂“黑科技”效应的愈演愈烈,已经出现了选用副厂镜头主要是因为看中高性能的趋势,即便有的副厂镜头也价格不菲。副厂镜头有一个常见的问题,就是跑焦——即实际拍摄最清晰点与选定对焦点不一致的现象。即便是较高端的单反机身具有AF微调功能、可以调节镜头的对焦点位置,但是由于副厂镜头的 In the past, most of the people who used the SLR lens often directed at the price performance, but with the intensification of the deputy technology factory “black technology” in recent years, the use of the deputy factory lens has appeared mainly because of the fancy of high performance, even if Some deputy factory lenses are also expensive. Deputy factory lens has a common problem is to run coke - the actual shooting the clearest point and the selected focus point is inconsistent phenomenon. Even higher-end SLR body with AF fine adjustment function, you can adjust the focus of the lens position, but the deputy lens