Sky-watcher EQ8 User Manual download pdf (Page 12)

PART II: POLAR ALIGNMENT

2.5 Align the Polar Scope

Before using the polar scope for polar alignment, the polar scope itself must be calibrated to

ensure the pattern in the polar scope is aligned to the mount’s R.A. axis. This includes two

calibration routines:

Routine 1 - Align the pattern plate to the rotating axis of the polar scope

1. Choose a xed object (the Polaris at night, or a faraway object in daytime); put the reticle

in the FOV of the polar scope on the object by adjusting the two azimuth adjustment knobs

and the latitude jackscrew of the EQ8 mount. Tighten the R.A. axis.

2. Rotate the large knurled ring on the polar scope for exactly half a turn (Fig 2.5a).

Fig. 2.5a

Large knurled

ring

3. If the object remains at the center of the reticle in the polar scope after the rotation, then it

means the polar scope’s pattern plate has been aligned to the polar scope’s rotating axis

and no calibration is needed.

4. If the object deviates from the reticle, then use a 1.5mm Allen wrench to adjust the three

small Allen screws on the polar scope (Fig. 2.5b) to eliminate the deviation to HALF. (Fig.

2.5c)

Fig. 2.5b Fig. 2.5c

6. Repeat steps 1-4 a few times until the object keeps at the center of the reticle when rotat-

ing the mount in R.A. axis

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Sky-watcher EQ8 User Manual Page 12