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Celestron AstroMaster 76 EQ Manual

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The AstroMaster mount comes with two slow motion control cables that allow you to make fine pointing
adjustments to the telescope in both R.A. and Declination. To install the cables:
1. Locate the two cables with knobs on them (both are identical is size and length) and make sure the screw on
each cable end does not protrude through the opening.
2. Slide the cable onto the R.A. shaft as far as it will go. There are two R.A. shafts, one on either side of the
mount. It makes no difference which shaft you use since both work the same (unless you are using a motor
drive). Use whichever one you find more convenient.
3. Tighten the screw on the R.A. cable to hold it securely in place.
4. The DEC. slow motion cable attaches in the same manner as the R.A. cable. The shaft that the DEC. slow
motion knob fits over is toward the top of the mount, just below the telescope mounting platform.
Figure 2-15
R.A. Shaft on bottom and Dec. Shaft on top
Figure 2-16
R.A. & Dec. Cables with knobs attached
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The telescope optical tube attaches to the mount via a dovetail slide bar mounting bracket at the top of the mount
(Figure 2-16). For the 114 EQ Newtonian, the mounting bar is the bracket which is attached to the tube rings. For
the 70 EQ refractor and the 76 EQ Newtonian the mounting bar is attached along the bottom of the telescope tube
.
Before you attach the optical tube, make sure that the declination and right ascension locking knobs are tight
(Figure 2-17).
Then, make sure that the latitude adjustment screws (Figures 1-1 & 1-2) are tight. This will
ensure that the mount does not move suddenly while attaching the telescope optical tube. Also, remove the objective
lens cap (refractor) or the front opening cap (Newtonian). To mount the telescope tube:
1. Remove the protective paper covering the optical tube. You will have to remove the tube rings on the
114 EQ Newtonian before removing the paper.
2. Loosen the mounting knob and the mounting safety screw on the side of the dovetail mounting platform so
they do not protrude into the mounting platform – see Figure 2-18.
3. Slide the dovetail mounting bar into the recess on the top of the mounting platform (figure 2-17).
4. Tighten the mounting knob on the dovetail mounting platform to hold the telescope in place.
5. Hand tighten the mounting platform safety screw until the tip touches the side of the mounting bracket.
NOTE: Never loosen any of the knobs on the telescope tube or mount other than the R.A. and DEC knobs.
Hint:
For maximum rigidity of the telescope and mount, make sure the knobs/screws holding the tripod legs to
the tripod head are tight.
… 8 …


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