Vivitar VIV-TEL-76700 - Manual (Page 8)

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Assembling Your Telescope (continued)
6. Take off the thumb nuts for the sighting scope , and
loosely insert the two bolts on the sighting scope
bracket so they are aiming the main tube into them.
Whirl the thumb nuts back and tighten them (see fig.
4a).
7. Install the eyepiece (or erecting eyepiece ) in the
eyepiece joint tube, tighten the locking screws (see fig.
4b ).