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3. If the object remains at the center of the reticle in the polar scope after the rotation, then
it means the polar scope has been aligned to the R.A. axis and no calibration is needed.
4. If the target deviated from the reticle, then use a 1.5mm Allen wrench to adjust the three
small Allen screws on the polar scope (Fig. 3.4a ) to eliminate the deviation to half. (Fig.
3.4b)
5. Repeat steps 1 to 4 a few times until the object keeps at the center of the reticle when ro-
tating the mount in R.A. axis.
Fig. 3.4a Fig. 3.4b
Note:
• When adjusting the Allen screws, loosen one screw only ¼ of a turn, and then tighten the
other two.
• Do not over tighten the Allen screws; it might damage the pattern plate in the polar scope.
• Do not loosen one screw completely or loosen more than one screw at a time; otherwise,
the pattern plate in the polar scope will be disengaged and further adjustment is impossi-
ble.
• If the pattern plate does disengage, remove the polar scope’s eyepiece by turning the
knurled ring counterclockwise and then engage the pattern plate again.
PART III: POLAR ALIGNMENT
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NCP
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