VEVOR FLM-R30-FT Mode D'emploi page 434

Our surface ring mark runs same with ring mark, but the inside surface mark is different,
because the rotary axis who hold the ring will be slant, so the inside surface will also slant, so will
effect the focus and calibration(ring text mark doesn't support 9 points calibration)
So with this plug, we mainly shows inside surface ring mark, when inside surface ring mark,
we need to click
Also need to open two axis function,
axis, so the focus length value what input to the software will change a little, firstly we make the
focus point on center of the ring.
Diameter of the ring:：when outside mark, its from center to the out surface of the ring. When
inside mark, its ring center to the inside surface of the ring. Software will calculate according to
these value.
Depth of the ring：the distance from outside to inside of the ring surface.
L：distance from the ring installation surface to the rotate center
one for rotary, the other for slant, because of the slant
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