当调校至某一光圈值时，穿过镜头的光量是前一光圈值的一半。每个光圈值称为一个“光圈档”。

This camera is easy to operate with the function of automatically adjusting the diaphragm and distance.

youdao

当调校至某一光圈值时，穿过镜头的光量是前一光圈值的一半。每个光圈值称为一个“光圈档”。

This camera is easy to operate with the function of automatically adjusting the diaphragm and distance.

youdao