12
Fig.h-2
Fig.h-3
Unlock the RA axis and rotate it until the reticule pattern shows the Polaris Location Indicator at the
very bottom (i.e., the 6 o'clock position - See Figure h-2). Re-lock the RA axis.
Loosen the RA setting circle by loosening the setscrews, then turn the setting circle so that its
indicator is pointing to zero. Do not rotate the mount in RA, just loosen and move the RA Setting
Circle. When done, tighten the setscrews.
Now unlock the RA axis and rotate the mount so the Setting Circle indicator points to 1 h 0 m. Use
the top scale if you are in the northern hemisphere and the bottom scale if you are in the southern
hemisphere. Lock the RA axis.
Polaris
NCP
Octans
C
a
s
s
i
o
p
e
i
a
B
i
g
D
i
p
p
e
r
1.
2.
3.
4.
5.
6.
Rotate the mount in RA 180 degrees (i.e., 12 hours on the RA
setting circle).
Note the displacement of your target from the centre of the
crosshairs. If it is not displaced at all, it means your polar
scope reticule is already properly aligned and you don't need
to do any more. If it is displaced, continue with the next step
of the alignment procedure.
Use the three adjustment screws on the polar scope to move
the reticule so that exactly one-half of the displacement is
corrected for. For example, if the displacement were about
half an inch in the direction of 1 o'clock, then you would adjust
the cross at the centre of the reticule to go half the distance in
that direction (See Figure h-3).
Now continue to move the cross using the altitude and
azimuth adjusters on the mount. When the target is back
under the cross, go back to step 2, but this time rotate the
mount 180 degrees in the opposite direction. If you still get
displacement of the target, repeat steps 3-5.
1.
2
3.
4.
5.
Step 2: Aligning the Polar Scope Reticule
The polar scope needs to be aligned with the polar axis of your mount. The steps below tell you how to
perform this alignment. Note, you can do this procedure at night while pointing at Polaris. However, it is
probably easier to do it in the daytime using a distant point as your target (e.g, a street light a couple of
hundred yards away). If doing the procedure during the day, you might find it convenient to set your
altitude to near parallel with the ground to put the eyepiece of the polar scope into a comfortable
position. Just be sure to leave room to make vertical adjustments in both directions. Also, do this
procedure without an OTA or counterweights. It will make turning the mount a lot simpler.
If target drifted to here
adjust reticule to
place it here (half
the distance)
Rotate your Date/Longitude scale so that October 10 lines
up with the Date Scale Indicator (i.e., 10th day of month
10).
Unlock the RA axis and rotate it back so the RA Setting
Indicator points to zero again on the RA Setting Circle
scale.
Use small flat head screw driver to loosen the setscrew on
the Index Marker Ring. Rotate the ring so that the marker
is aligned with October 10 on the datescale. Tighten the
setscrew to lock the ring in place.
After completing these steps you will have the reticule in the
proper orientation.
Locate a distant object and place it under the cross at the centre of the polarscope reticule.
Step 1: Orienting the Polar Scope Reticule
Follow the steps as outlined below to properly orient the reticule inside the polar scope.
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