Orion OBSERVER 70MM AZ User Manual
INSTRUCTION MANUAL
Orion®
Observer™ 70mm AZ
#9881 Altazimuth Refractor Telescope
Providing Exceptional Consumer Optical Products Since 1975
Customer Support (800) 676-1343
E-mail: support@telescope.com
Corporate Offices (831) 763-7000
89 Hangar Way, Watsonville, CA 95076
IN 210 Rev. B 02/09
2
Welcome to the exciting world of amateur astronomy. Your new Observer 70 Altazimuth Refractor is a
®
quality optical instrument that will deliver countless hours of exciting stargazing, from magnified views of
the Moon, star clusters and nebulas to glimpses of Jupiter’s moons and Saturn’s rings. The Observer 70
includes everything you need to go from box to backyard in less than half an hour.
These instructions will help you set up, use and care for your new telescope.
Table of Contents
1. Unpacking........................ 3
2. Parts List......................... 3
3. The Basic Components of
Your Telescope .................... 5
4. Assembly ....................... 10
5. Getting Started ................... 10
6. Using Your Telescope .............. 12
7. Care and Maintenance ............. 15
8. Specifications .................... 16
1. Unpacking
The entire telescope system will arrive in one box. Be careful
unpacking the box since some of the contents are small and
easy to overlook. We recommend keeping all the original
packaging. In the event you need to ship the telescope to
another location, or return it to Orion for warranty repair, hav-
Warning: Never look directly at the Sun through
your telescope or its finder scope—even for an
instant—without a professionally made solar
filter that completely covers the front of the
instrument, or permanent eye damage could
result. Young children should use this telescope
only with adult supervision.
ing the proper packaging will help ensure that your telescope
will survive the journey intact.
Make sure all the parts in the parts list are present. Familiarize
yourself with their features and compare them to the callouts
on Figures 1, 2, and 3 when possible. If anything appears to
be missing or broken, immediately call Orion Customer
Support (1-800-676-1343) for assistance.
2. Parts List
Qty. Description (Figure callout #)
1 Optical tube assembly (1)
1 Altazimuth yoke mount (5)
1 Altitude micro-motion control rod and thumbwheel
(13)
3 Tripod legs (6) with attached accessory tray bracket
(22)
1 Accessory tray (7)
1 EZ Finder II reflex sight (4)
1 EZ Finder II mounting bracket (11)
3 Tripod attachment screws (21) with wingnuts and
washers
3 Accessory tray attachment wing screws
3 Leg lock knobs (23)
2 Yoke knobs (18)
1 25mm Explorer II eyepiece (3)
1 10mm Explorer II eyepiece (24)
1 90° mirror star diagonal (2)
1 Dust cover (25)
3
Observer 70 Refractor
1
4
5
3
7
2
6
Figure 1.
4
Observer 70 Components.
®
3. The Basic Components of Your Telescope
Figure 1 shows the fully assembled Observer 70. All the major components of the telescope are described and numbered to
help you identify each part and understand its use. Refer back to this figure when assembling the telescope.
1
Optical tube
This is the main optical component of the telescope. The
glass lens at the front of the tube gathers incoming
light and focuses it by bending (or refracting) the light
rays. The tube assembly has several parts built into it,
which are shown and discussed in detail in the next
section.
2
90° Mirror star diagonal
The diagonal contains a mirror that reflects the light gath-
ered through the optical tube to the eyepiece. The diagonal is angled to allow for viewing objects that are high
in the sky from a comfortable position.
3
25mm Explorer II eyepiece
The eyepiece is the part of the telescope that you actually
look through to see things. The focal length of the eyepiece and the telescope determines the magnifying
power of the telescope. Magnification is discussed in
more detail in the Using Your Telescope section.
4
EZ Finder II reflex sight
This is a special “finder” that helps you aim the telescope
and locate objects in the sky for viewing. The EZ Finder
II generates a red LED “dot” that shows where your
telescope is aimed. The use of the EZ Finder II is discussed in the Getting Started section.
5
Altazimuth yoke mount
The mount couples the telescope to the tripod and allows
you to move the optical tube easily both up and down
and right and left.
6
Tripod legs
These aluminum tripod legs support the telescope and
can extend from 27" to 50" long.
7
Accessory tray
This tray is a convenient place for holding extra eyepieces
and other small pieces of equipment.
5
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