Orion 13032 User manual

INSTRUCTION MANUAL
Orion®2" Dual-Speed Crayford
Focuser for Orion Refractors
#13032
IN 394 Rev. A 05/10
Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA
Toll Free USA & Canada: [phone]
International: [phone]
Customer Support: [email protected]
Copyright © 2021 Orion Telescopes & Binoculars.All Rights Reserved. No part of this
product instruction or any of its contents may be reproduced, copied, modied or adapted,
without the prior written consent of Orion Telescopes & Binoculars.
AN EMPLOYEE-OWNED COMPANY

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Congratulations on your purchase of a quality Orion 2" dual-speed
Crayford focuser. This focuser is intended for use with the Orion ED-80, ED-100,
Astroview 100, 120ST and the SkyView Pro 120mm. If you do not have one of
these refractors, the focuser may not be appropriate for your telescope.
Crayford focusers generally perform better than rack-and pinion 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 strong machined aluminum construction supports heavy 2" eyepieces as well
as heavy camera bodies. The smooth focus motion and ne-focus wheel allow
precision adjustments for critical focusing of eyepieces and cameras.
Installation
This focuser was designed to be a “drop-in” replacement for the refractors listed
above. If you have one of these telescopes, installing the 2" Crayford will be easy.
You will only need a Phillips head screwdriver. Use the following procedure:
1. Locate the three screws holding the existing focuser onto the tube wall. In the
case of the larger 120mm refractors, locate the screws that hold the focuser
to the optical tube adapter collar.
2. Remove these three screws, making sure to hold onto the focuser itself so it
does not fall when the last screw is removed. Do not lose the screws as they
will be required to install the new focuser.
3. Remove the 2" focuser from the tube.
4. Place the 2" dual-speed Crayford focuser where the other focuser was
previously.
5. Install the three screw, and tighten the screws rmly.
Usage
Using the 2" dual-speed low-prole Crayford focuser is very straightforward. Place
your 2" eyepiece in the focuser drawtube, and secure it in place with the thumb-
screw. Imaging cameras should generally utilize a 2" camera adapter when used
with the focuser. Insert the camera adapter the same way as a 2" eyepiece. To
focus, simply rotate one of the focus wheels.
The large focus lock thumbscrew near the focusing shaft (see Figure 1) locks the
drawtube into position once focus has been achieved. This is especially useful
when using a camera or heavy eyepiece in the focuser. Be sure this thumbscrew
is loosened when focusing. The socket head set screws above the focus lock
thumbscrew (see Figure 1) adjusts drawtube focusing tension. If a heavy eyepiece
causes the drawtube to move inward by itself (drawtube tension too loose), or the
focus wheels are difficult to turn (drawtube tension too tight), then you will want

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to adjust these set screw. This requires the included hex keys. Slightly loosen the
center screw, then slightly tighten the outer screws equally. Test for tension and
repeat if necessary (or reverse the procedure if the tension is too tight).
Fine Focus
The focuser features dual speed adjustment with the ne focus wheel. This small
black wheel located on the side of the right hand focus wheel allows precise focus
adjustment at a ratio of 11:1, meaning one turn of the focus wheel equals eleven
turns of the ne focus wheel. Use the focus wheels to achieve rough focus on your
target object, then use the ne focus wheel to coax out even more detail. You’ll be
amazed at the amount of detail ne focus adjustments allow you to view on targets
such as the lunar surface, planets, double stars, as well as other celestial objects.
The 1.25" Eyepiece Adapter
In order to use a 1.25" eyepiece in the focuser, you must rst install the 1.25" eye-
piece adapter. Place this adapter into the drawtube like a 2" eyepiece, and loosely
secure it with the thumbscrew. Insert a 1.25" eyepiece into the adapter, and secure
the eyepiece by further tightening the thumbscrew.
Figure 1. The Orion 2” dual-speed Crayford focuser for Orion Refractors.
Eyepiece thumbscrews
Focus
wheel
Focus wheel
Fine focus wheel
Focus
lock
knob
1.25" Eyepiece adapter
Drawtube
tension
adustment
screws

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Specifications
Focuser design: Crayford, accepts 2" eyepieces and 1.25" eyepieces with
included adapter.
Focus travel: 75mm
Other features: Focus lock, drawtube focusing tension adjustments, ne
focus wheel (11:1).
Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA
Toll Free USA & Canada: [phone]
International: [phone]
Customer Support: [email protected]
Copyright © 2021 Orion Telescopes & Binoculars.All Rights Reserved. No part of this product
instruction or any of its contents may be reproduced, copied, modied or adapted, without the
prior written consent of Orion Telescopes & Binoculars.
AN EMPLOYEE-OWNED COMPANY
One-Year Limited Warranty
This Orion product is warranted against defects in materials or workmanship for
a period of one year from the date of purchase. This warranty is for the benet of
the original retail purchaser only. During this warranty period Orion Telescopes &
Binoculars will repair or replace, at Orion’s option, any warranted instrument that
proves to be defective, provided it is returned postage paid. Proof of purchase
(such as a copy of the original receipt) is required. This warranty is only valid in the
country of purchase.
This warranty does not apply if, in Orion’s judgment, the instrument has been
abused, mishandled, or modied, nor does it apply to normal wear and tear. This
warranty gives you specic legal rights. It is not intended to remove or restrict your
other legal rights under applicable local consumer law; your state or national statu-
tory consumer rights governing the sale of consumer goods remain fully appli-
cable.
For further warranty information, please visit www.OrionTelescopes.com/warranty.