Orion SkyScanner BL 102mm Instruction Manual page 6

Bearing
cylinders
Dust cap
A
B
Figure 11. A) The optical tube and other parts of the SkyScanner BL 135mm Dobsonian. B) The main base components.
provides dim illumination while pushing the switch all
the way to the right provides brighter illumination. Typi-
cally the dimmer setting is used under dark skies and
the brighter setting is used under light-polluted skies or
in daylight. Position your eye at a comfortable distance
from the rear of the unit. Look through the rear of the
finder scope with both eyes open to see the illuminated
red dot. The target object should appear in the field of
view somewhere near the red dot.
5. You'll want to center the target object on the red dot. With-
out moving the telescope, use the finder scope's altitude
6
Altitude tension
knobs
Screwdriver
Assembly
screws
Handle
Spring washer
Side panels
Front panel
Azimuth tension knob
10mm 25mm
eyepiece eyepiece Barlow
Red dot scope
Flat washer
Top ground plate
Side braces
and azimuth adjustment knobs (shown in Figure 9A) to
position the red dot on the object.
6. When the red dot is centered on the distant object, check
to make sure the object is still centered in the telescope's
eyepiece. If it isn't, re-center it then adjust the finder
scope's alignment again. When the object is centered in
the telescope eyepiece and on the finder scope's red dot,
the finder scope is properly aligned with the telescope.
The red dot finder scope's alignment should be checked
before every observing session.
Optical tube
3x
Bottom ground plate
Eyepiece rack