Camera Distance

Select [Yes] and input in the text box the nominal focal distance of the lens. The units are millimeters.

It is possible to select [No] to calculate the focal distance automatically.
However, when the camera optical axis is perpendicular with the calibration grid, the focal distance cannot be calculated correctly.
If the focal distance calculated automatically deviates from the nominal focal distance by }10% or more, select [Yes] and input the nominal focal distance of the lens used.