Orion SkyScanner BL 102mm Instruction Manual page 8

Figure 17. Install the carry handle and the eyepiece rack as shown.
Bearing cylinders
Figure 18. Attach a pair of bearing cylinders to the inside of both
of the side panels. Insert the screws from the outside of the panels.
between the indoor and outdoor air will cause image blurring
and distortion.
If at all possible, escape the light-polluted city sky and head for
darker country skies. You'll be amazed at how many more stars
and deep-sky objects are visible in a dark sky!
Cooling the Telescope
All optical instruments need time to reach "thermal equilib-
rium." The bigger the instrument and the larger the temperature
change, the more time is needed. Allow at least 20 minutes for
your telescope to acclimate to the temperature outdoors before
you start observing with it.
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Figure 19. Lift the optical tube
into the base, resting the altitude
hubs on the bearing cylinders
installed in the previous step.
Figure 21. The SkyScanner BL Dobsonians have two axes of
motion: altitude (up/ down) and azimuth (left/right).
Thumbscrew
Figure 22. The focuser on the SkyScanner BL 135mm Dobsonian
has a 1.25" adapter, which can be removed by loosening the
thumbscrew. With the adapter removed, the focuser can accept
optional 2" eyepieces.
Figure 20. Thread an altitude
tension bolt through the hole in
the side panel and into the altitude
hub on each side.
1.25" adapter
Drawtube collar