粗准焦螺旋和细准焦螺旋对镜筒上下移动的范围有什么影响?为什么要先用粗准焦螺旋进行初调,
粗准焦螺旋和细准焦螺旋对镜筒上下移动的范围有什么影响?为什么要先用粗准焦螺旋进行初调,
然后在用细准焦进行微调?
然后在用细准焦进行微调?
生物人气:509 ℃时间:2020-01-25 13:59:59
优质解答
粗准焦螺旋移动的范围大(很明显可以看出镜筒的移动),细准焦螺旋移动的范围小(几乎看不出),直接用细准焦螺旋调的话要调很久,所以就先大范围地调一下~
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