彩色照相冲扩设备技术原理及操作维护（１２）上海八一电影机械厂张仁清（二）操作键组合使用功能例举（续）§４．物镜调焦：分离物镜出厂前已在本厂样机调试好，一般情况下，用户买回去可直接装在８１２Ｋ扩印机上使用，不必再做进一步调整，若用户感到清晰度不够好时，... Color photographic Chong expansion equipment technical principles and operation and maintenance (12) Shanghai Bayi Film Machinery Factory Zhang Renqing (two) the operation of the key combination of functional examples (continued) §4. Focusing objective lens: the separation of the objective lens factory prototype debugging in the factory, under normal circumstances, the user can buy back directly on the 812K printer, do not have to make further adjustments, if the user feel the clarity is not good enough, ...