Orion 10066 StarSeeker III 90mm Mak-Cass GoTo, Instruction Manual

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3. Tighten the thumbscrews to hold the star diagonal in
place.
The eyepiece, or ocular, is the optical element that magnifies
the image focused by the telescope.
The eyepiece fits directly into the 1.25" accessory adapter or
star diagonal. To install one of the included eyepieces:
1. Loosen the thumbscrew on the 1.25" adapter or star
diagonal.
2. Slide the chrome barrel of the eyepiece into the adapter
or diagonal (Figure 7).
3. Tighten the thumbscrew to hold the eyepiece in place.
Installing the EZ Finder II
Before installing the EZ Finder II
(Figure 8) on the telescope,
you may need to insert the included CR2032 3V lithium but-
ton cell battery. In some cases, the battery may have been
installed at the factory. If there is a small plastic tab sticking
out from the battery compartment cover, you must remove it
for the battery to make contact with the EZ Finder’s electron-
ic circuitry. The tab can then be discarded. If the battery was
not installed at the factory and is provided separately, you will
have to install it, as follows:
1. Insert a small, flat-blade screwdriver into the notch in
the battery compartment cover and gently pry it off
(Figure 8) .
2. Slide the battery under the retaining clip with the positive
(+) side facing down (touching the clip).
3. Then press the battery compartment cover back on.
Should the battery die, replacement CR2032 batteries are
available at many stores where small batteries are sold or
online.
To attach the dovetail mounting bracket to the EZ Finder II,
loosen the two thumbscrews on the bottom rail of the EZ
Finder II. Slide the EZ Finder II onto the bracket and tighten
the two thumbscrews (See
Figure 8). Then simply slide the
mounting bracket’s foot into the dovetail mounting shoe as
shown in
Figure 9 and tighten the thumbscrew on the shoe to
secure the mounting bracket.
The EZ Finder II should be oriented so that the sight tube is
facing the front of the telescope, as shown. Tighten the thumb-
screw on the dovetail shoe to secure the EZ Finder II in place.
learning to use the
EZ Finder, Eyepieces,
and Focuser
The EZ Finder II
The EZ Finder II works by projecting a tiny red dot (it is not
a laser beam) onto a lens mounted in the front of the unit.
When you look through the EZ Finder II, the red dot will appear
to float in space, helping you to pinpoint your target object
( Figure 10). The red dot is produced by a light-emitting diode
(LED) near the rear of the sight. The 3V lithium battery pro-
vides the power for the diode.
For the EZ Finder II to work properly, it has to be aligned with
the telescope. When the two are aligned, a celestial object that
is centered on the EZ Finder II’s red dot should also appear
in the center of the telescope’s eyepiece. Alignment of the
EZ Finder II is easiest during daylight, before observing at
night. Aim the telescope at a distant object such as a tele-
phone pole or roof chimney and center it in the telescope’s
eyepiece. The object should be at least 1/4 mile away. Now
turn on the EZ Finder II and look though it. Without moving the
main telescope, use the EZ Finder II’s azimuth (left/right) and
altitude (up/down) adjustment knobs (see
Figure 8) to position
the red dot on the object in the eyepiece. When the red dot is
centered on the distant object, check to make sure that the
object is still centered in the telescope eyepiece. If it isn’t, re-
Figure 8.
The EZ Finder II’s On/Off and adjustment knobs.
ON/OFF
Brightness control
Altitude
adjustment
control
Dovetail
tightening
screws
Azimuth
adjustment
control
Battery
compartment
cover
Sight tube
Figure 7.
Insert the chrome barrel of the eyepiece into
the diagonal and secure with the two thumbscrews. For the
StarSeeker III reflector models, the eyepiece is inserted
directly into the focuser’s accessory adapter.