SynScan V2 Instruction Manual page 19

Carefully nudge the telescope in horizontal
12.
motion using only one finger while observing
the movement of Polaris through the eyepiece
(Fig.A-7). This is to determine which direction
(left or right) moves Polaris closer to the center
of the eyepiece.
Next step is to adjust the adjustment screws
13.
on the mounting plate according to your
finding from step 12. If Polaris moves toward
the center when the telescope is nudged
toward your right hand side, You will need to
loosen the adjustment screws near the front of
the tube and tighten the ones closer to the
back of the tube (Fig.A-8), and vise versa
(Fig.A-9). Look into the eyepiece. Adjust the
screws just enough to place Polaris HALF the
distance back to the center (Fig.A-10).
Fig.A-8
14. Repeat step 7 to 13 until Polaris remains in the center of the eyepiece, or moves slightly
around the center, when the mount is rotate about the R.A. axis.
This calibration method can be applied on both refracting and reflecting
telescopes. Optical path of different telescope designs does not affect how the
telescope tube and tube rings should be adjusted on the mounting plate.
Fig.A-9
III
Fig.A-7
Fig.A-10
Place Polaris here
Polaris