Assembly - Orion 23013 Instruction Manual

Ebony Star
Pebbly Formica surface on the azimuth axis on
which the Teflon pads make contact, providing buttery smooth
movement.
Eyepiece
A lens-containing barrel that magnifies the image
formed by the telescope and allows your eye to focus on it.
Eyepieces of different focal lengths will produce different magni-
fication factors.
Finder Scope
A highly recommended optional accessory. It is a
small, low-power refracting telescope, usually with crosshairs, which
mounts on the optical tube of the main telescope to aid in pointing
the telescope. Its wide field of view facilitates the location of target
objects. When properly aligned with the main telescope, an object
centered in the finder scope will also be centered in the main tele-
scope's much narrower field of view.
Focuser
A type of mechanical holder for the eyepiece that
enables the eyepiece to be moved in and out to achieve sharp
focus of the viewed image.
Optical Tube
The main body of the telescope, which houses the
optics.
Optical Tube Handles
Premium Deep Space Explorers come
with two handles to assist in lifting the optical tube onto and off of
the Dobsonian cradle. The handles are attached to the altitude
bearings on opposite sides of the optical tube.
Primary Mirror
The large, concave mirror located at the back
end of the optical tube. It reflects incoming light to the secondary
mirror near the front of the tube.
Primary Mirror Cell
The mechanical holder for the primary mir-
ror. It features alignment-adjusting bolts (usually three) that allow
exact positioning of the tilt of the primary mirror.
Secondary Mirror
The small, elliptically shaped, flat mirror
located inside the optical tube beneath the focuser. Its function is to
divert the light transmitted from the primary mirror sideways into the
focusing tube.
Secondary Mirror Holder
ondary mirror; usually a single stalk or an adjustable multivane
"spider".
Top Baseplate
On the Dobsonian base, the uppermost of the
two round boards, which rests atop the ground baseplate. It sup-
ports the vertical struts of the telescope tube cradle. The top
baseplate rotates on the ground baseplate, allowing the tele-
scope to be moved in the azimuthal direction.

3. assembly

unpacking Your new telescope
The telescope is packaged in three boxes, one containing the
telescope tube, another containing the optics, and the other con-
taining the unassembled Dobsonian base and hardware. Exercise
care when unpacking the boxes. We recommend keeping the
original shipping containers; in the event that the telescope needs
to be shipped to another location or returned to Orion for war-
ranty repair, having the proper shipping containers will help
ensure that your telescope will survive the journey intact.
The mechanical holder for the sec-
Parts list
Qty. Description
1 Optical Tube
1 Primary Mirror Cell
1 Ground Baseplate
1 Top Baseplate
2 Cradle Sides
1 Cradle Front Brace
8 Wood Screws (socket-head)
4 Black Plastic Screw-head Caps
1 Azimuth Pivot Bolt
1 Cylindrical Nylon Bushing
1 Locking Nut
2 Nylon Washers
3 Wood Feet
3 Self-tapping Wood Screws (Phillips-head)
2 Optical Tube Handles
1 26mm Sirius Plössl Eyepiece (1.25" barrel diameter)
4 Primary Mirror Cell Mounting Bolts (socket-head)
2 Allen Wrenches
assembly of the Dobsonian Base
Before the telescope can be used, the base must be assembled
(refer to Figure 1, page 11). This has to be done only once,
unless you disassemble the base for long term storage. The
assembly process takes about 15 minutes and requires a Phillips
screwdriver, the Allen (hex) wrench provided, and two 1/2" cres-
cent wrenches, or a combination of a common wrench, crescent
wrench, or pliers.
Note: When tightening screws, tighten them by hand until firm,
but be careful not to strip the holes by overtightening. If you use
an electric screwdriver, do final tightening by hand.
1. Screw the wood feet into the underside of the ground base-
plate (A) using the self-tapping wood screws provided, with a
Phillips screwdriver. Position the feet on the underside of the
ground baseplate from the preinstalled Teflon pads, directly
beneath them.
2. Loosely attach the front brace (B) of the cradle to the two
sides (C) with four of the eight socket-head wood screws in
the predrilled holes, using the large Allen wrench provided.
Do not completely tighten the screws yet.
3. Attach the two sides (C) to the top baseplate (D) with the
remaining four socket-head wood screws in the predrilled
holes. Tighten all four screws.
4. Tighten the four side screws installed in step 2, then press on
the black plastic screw-head caps.
5. Insert the nylon bushing (E) into the hole in the center of the
top baseplate (D). Tap the bushing so it goes all the way into
the top baseplate and part way into the ground baseplate (A).
The bushing should be flush with the top surface of the top
baseplate (D).
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