With this design method, not only the determination procedure of the initial constitution of a zoom lens is simplified, but also the operation is simple and convenient.
采用该设计方法使得在确定变焦镜头的初始结构时，不但步骤简化，而且操作简单方便。
With this design method, not only the determination procedure of the initial constitution of a zoom lens is simplified, but also the operation is simple and convenient.
采用该设计方法使得在确定变焦镜头的初始结构时，不但步骤简化，而且操作简单方便。
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