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如何调节光圈大小
更新时间: 2020-10-31 00:00:00  

调节光圈大小,首先进入机身内感光面的光量的装置,它通常是在镜头内。表达光圈大小是用f值。对于已经制造好的镜头,不可能随意改变镜头的直径,但是可以通过在镜头内部加入多边形或者圆形,并且面积可变的孔状光栅来达到控制镜头通光量,这个装置就叫做光圈。

关键词: 如何 调节 光圈 大小

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