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Another way to find the correct Focal Length
找到正确的焦距的另一种方法
In order to find the right focal length on our machine easily, we add two red light pointers in our machine. One was installed
inside the machine, and the other one is outside the machine. You can raise or fall the Z axis of the machine in order to let the
two red light pointers meet together, then you find the right FL, as shown in the figure.
为方便寻找焦距,我们在机器上设置了两个红光指示器。一个内置,另一个外置。您可以调节机器的
Z
轴的升降,
使两个红色斑点重合在一起,即找到焦距,如图所示。