Download Print this page

Orion BX90 Instruction Manual page 5

90mm equatorial refractor

Advertisement

Lock knob
A
Figure 3. A)
Hook the tray corner over the screw in the leg collar
Gasket
Figure 4.
To install the equatorial mount, first remove the azimuth
tension knob.
Hooked tab
Accessory
tray
Screw
Leg collar
B
Azimuth tension
knob
, B)
Repeat for the other two legs, then
Doing so will allow the pre-installed 3V CR-2032 button cell bat-
tery to make contact with the finder scope's electronic circuitry
to power the finder's red LED illuminator. The tab can then be
discarded.
To use the red dot finder scope properly, it must be aligned with
the main telescope. This is easiest to do during daylight hours,
before observing at night. Follow this procedure:
1. First, remove the dust cap (M) from the front of the tele-
scope.
2. With the star diagonal and 25mm eyepiece already in
place from step 11 above, point the telescope at a well-
defined land target (e.g., the top of a telephone pole) that's
at least a quarter mile away. Center the target in the eye-
piece by turning the slow-motion cables as needed to point
the telescope. For larger telescope movement, release the
R.A. and Dec. axis lock knobs (Figure 7) and move the
telescope tube by hand to the approximate location, then
retighten the lock knobs and make finer pointing adjust-
ments with the slow motion cables.
Figure 5.
Place the equatorial mount on the tripod, then secure
it with the azimuth tension knob.
C
C)
Tighten all three tray lock knobs.
Gasket
5

Advertisement

loading

This manual is also suitable for:

52588