做的暗场像全是亮斑，好像也没有焦点，怎么回事？
？[img=,512,533]https://ng1.17img.cn/bbsfiles/images/2017/02/201702152149_01_3159456_3.jpg[/img][img=,512,533]https://ng1.17img.cn/bbsfiles/images/2017/02/201702152149_02_3159456_3.jpg[/img][img=,512,533]https://ng1.17img.cn/bbsfiles/images/2017/02/201702152149_03_3159456_3.jpg[/img]