Polar Scope Calibration
How to properly calibrate the reticle of the polar scope to increase star tracking precision
To check if the reticle is centered, you have to collimate an object such as an antenna, a roof or a power line pylon while daylight time and rotate the polar scope on its axis. The center of the grid must always remain on the selected point.
If the reticle results to be off-center, you will need to proceed with the calibration. The process may not be easy for everyone, so before making any changes, I recommend to make some shooting tests in order to check if the accuracy is fine enough for your own purpose. However, the more centered the reticle, the longer the tracking time achievable.
With an allen wrench, do very small adjustments tighting a screw after releasing opposite screws to move the reticle according to compensate the deviation from the center. Do very small movements and check the status rotating the polar scope. Repeat the operation until the reticle is calibrated to the center.