focus crank ; focus lever
... focus lock function 焦点锁定功能 focusing lever 调焦杆 forced flash mode 强制闪光模式 ...
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... 当代女性散文 chinese contemporary women ' s essay 调焦杆 focus crank 卷曲螺旋 coiled coil ...
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传统的凸轮调焦机构和丝杆丝母调焦机构存在结构复杂；加工、装调难度大；
The traditional focusing mechanism has several disadvantages, such as complex structure, difficult alignment, slow response, poor positioning accuracy, etc.
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