1)focusing stop,调焦光圈2)focussing ring,调焦圈，对光环3)focusing ring,调焦圈4)focus and light,调焦调光5)diaphragm preselection ring,光圈调节圈6)laser focus,激光调焦
用法例句
The circuit implementation of the multifunction focus and light adjustment system
多功能调焦调光系统电路实现
We use a space coordinate method to position and point the target and align the laser beam, and use an off-focus radius-finding technique to find the laser focus.
