National Geographic NG90EQ Telescope User Manual


 
6
7) The counterweight balances your telescope and makes it easy to adjust and
position. Hold the counterweight in your hand so you can see through the hole in the
weight. Make sure that the black tightening knob on the counterweight is facing
down. When you look through the counterweight, if you see that the hole is blocked
by a metal rod, slowly turn the tightening knob counterclockwise to loosen it until you
see that the hole is clear (see Fig. 8). Then insert the counterweight shaft through the
counterweight. Turn the tightening knob clockwise to tighten it. Then insert the
threaded end of the counterweight rod into the equatorial mount and turn it clockwise
until it stops (See Fig. 9 and Fig. 10).
(Fig. 8) (Fig. 9) (Fig. 10)
8) Attach the long slow-motion control knob to the chrome right ascension shaft as
shown in Fig. 11. Tighten the small chrome knob on the slow-motion control until it is
tight against the flat side of the right ascension shaft. Attach the shorter slow-motion
control to the chrome declination shaft as shown in Fig. 12 and tighten it into position.
Fig. 13 shows the completed assembly.
(Fig. 11) (Fig. 12) (Fig. 13)
9) Slide the finder scope into its bracket on top of the main optical unit. Tighten the
two small chrome screws to hold it securely in position (See Fig. 14).
(Fig. 14)