Orion 13036 Instruction Manual

Orion 2" Low-Profile Dual-Speed Hybrid Reflector Focuser
Eyepiece thumbscrew
Focus wheel
Drawtube tension adjustment screw
Focus lock thumbscrew
Congratulations on your purchase of a quality Orion 2" Low-
Profile Dual-Speed Hybrid Reflector Focuser. This focuser is
intended for use with 6" to 12" aperture Newtonian reflectors.
If you do not have a Newtonian reflector, the focuser may not
be appropriate for your telescope.
Crayford focusers generally perform better than rack-and-pin-
ion models because the design eliminates "focus shift" . Focus
shift is when an image moves position in the eyepiece when
it is being focused. This is very hard to eliminate in rack-and-
pinon focusers due to slight gear and tolerance imperfections
which cause the drawtube to move slightly left or right when
focusing. For the Crayford design, the drawtube is constantly
tensioned (by the focusing shaft and four "roller bearings")
so the drawtube cannot move perpendicular to the desired
motion.
The 2" Low-Profile Dual-Speed Hybrid Reflector Focuser pro-
vides the most focus range for accessories that require extra
in-travel. With a minimum focus height of 43mm, this focuser
is an excellent choice for any astrophotographic system. The
strong machined aluminum construction supports heavy
2" eyepieces as well as heavy camera bodies. The smooth
focus motion and fine-focus wheel allow precision adjust-
ments for critical focusing of eyepieces and cameras.
A N E M P L O Y E E - O W N E D C O M P A N Y
Copyright © 2021 Orion Telescopes & Binoculars. All Rights Reserved. No part of this product instruction or any of its contents
may be reproduced, copied, modified or adapted, without the prior written consent of Orion Telescopes & Binoculars.
INSTRUCTION MANUAL
Figure 1.
The Orion 2" Low-Profile Dual-Speed Hybrid Reflector Focuser.
#13036

Installation

This focuser was designed to be a "drop-in" replacement
for the 2" focuser that comes standard on Orion 8" and 10"
reflectors, including IntelliScope and Classic Dobsonians. If
you have one of these telescopes, installing the 2" Crayford
will be easy. You will need a Phillips head screwdriver and an
adjustable crescent wrench or pliers. Use the following pro-
cedure:
1. Position your Newtonian reflector optical tube so it is hori-
zontal. This will prevent any screws or nuts from falling
onto the primary mirror.
2. From the inside of the tube, secure one of the four focuser
securing nuts with the wrench or pliers.
3. Use the screwdriver to completely unthread the focuser
attachment screw from the securing nut currently being
held by the wrench or pliers.
4. Repeat this for the other three nut and screw pairs.
5. Remove the 2" focuser from the tube.
6. Place the 2" Low-Profile Dual-Speed Hybrid Reflector
Focuser where the other focuser was previously. Orient
the focuser the same as the removed one was. The
through holes in the base of the focuser should line up
with the holes in the telescope tube.
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Customer Support: support@telescope.com
Drawtube extension thumbscrew
1.25" eyepiece adapter
Focus wheel
Fine Focus wheel
IN 474 Rev A 08/12