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1. Parts List

Qty. Description

1

Optical tube assembly

1

German-type equatorial mount

1

Large counterweight

1

Small counterweight

1

Counterweight shaft 

3

Tripod Legs with mounting hardware

1

Accessory tray with mounting hardware

1

Accessory tray bracket

2

Slow-motion control cables

1

Polar axis finder scope

1

Plastic cover for polar axis finder scope

2

Optical tube mounting rings 

1

6x30 achromatic crosshair finder scope

1

Finder scope bracket with O-ring

1

Mirror star diagonal (1.25")

1

25mm (40x) Plössl eyepiece (1.25")

1

10mm (100x) Plössl eyepiece (1.25")

1

Objective lens dust cap

1

Lens Shade

1

Lens Shade dust cap

4

Assembly Tools (2 wrenches, Phillips screwdriver, 
flat-head screwdriver key)

C

ongratulations on your purchase of a quality Orion telescope! Your new AstroView 120 EQ Refractor

is designed for high-resolution viewing of astronomical objects. With its precision optics and equatorial
mount, you’ll be able to locate and enjoy hundreds of fascinating celestial denizens, including the plan-
ets, Moon, and a variety of deep-sky galaxies, nebulas, and star clusters.

If you have never owned a telescope, we are pleased to welcome you to amateur astronomy. Take some
time to familiarize yourself with the night sky. Learn to recognize the patterns of stars in the major con-
stellations; a star wheel, or planisphere, available from Orion or from your local telescope shop, will
greatly help. With a little practice, a little patience, and a reasonably dark sky away from city lights, you’ll
find your telescope to be a never-ending source of wonder, exploration, and relaxation.

These instructions will help you set up, properly use and care for your telescope. Please read them over
thoroughly before getting started.

Table of Contents

1. Parts List............................................................................................................................... 3

2. Assembly .............................................................................................................................. 4

3. Balancing the Telescope....................................................................................................... 5

4. Aligning the Finder Scope .................................................................................................... 6

5. Setting Up and Using the Equatorial Mount......................................................................... 7

6. Using Your Telescope–Astronomical Observing ................................................................... 11

7. Astrophotography.................................................................................................................. 14

8. Terrestrial Viewing................................................................................................................. 15

9. Care and Maintenance ......................................................................................................... 15

10. Specifications........................................................................................................................ 15

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.

Summary of Contents for 9026

Page 1: ...Consumer Optical Products Since 1975 Customer Support 800 676 1343 E mail support telescope com Corporate Offices 831 763 7000 P O Box 1815 Santa Cruz CA 95061 INSTRUCTION MANUAL Orion AstroView 120...

Page 2: ...arge counterweight Counterweight lock thumbscrews Toe saver retaining bolt Azimuth fine adjustment knobs Tripod leg Accessory tray bracket attachment point Accessory tray bracket Accessory tray Leg lo...

Page 3: ...and star clusters If you have never owned a telescope we are pleased to welcome you to amateur astronomy Take some time to familiarize yourself with the night sky Learn to recognize the patterns of st...

Page 4: ...he holes in the tray 5 Next tighten the wingnuts at the top of the tripod legs so the legs are securely fastened to the equatorial mount Use the larger wrench and your fingers to do this 6 Orient the...

Page 5: ...ich is locat ed at the rear of the R A axis Remove the rubber O ring from the finder and seat it in the groove that is just inside the housing s opening Insert the front end of the polar finder the en...

Page 6: ...ance point for the optical tube with respect to the Dec axis 5d 7 Retighten the tube ring clamps The telescope is now balanced on both axes Now when you loosen the lock lever on one or both axes and m...

Page 7: ...ered on the finder s crosshairs The finder scope is an invaluable tool for finding objects in the night sky its usage for this purpose will be discussed later in detail If when looking through the fin...

Page 8: ...he AstroView 120 is the polar axis finder scope housed inside the R A axis of the equatorial mount see Figure 3 When properly aligned and used it makes accurate polar align ment quick and easy to do A...

Page 9: ...ongitude of your observing site This information can be obtained by looking at a local map Now you must figure the difference between the longitude of your observing site and the closest standard time...

Page 10: ...e pointer indicates the R A coordinate listed for the bright star in the star atlas Do not retighten the setscrew when using the R A setting cir cles for finding objects the set screw is only needed f...

Page 11: ...through an open or closed window because the tempera ture difference between the indoor and outdoor air will cause image blurring and distortion If at all possible escape the light polluted city sky...

Page 12: ...r observing deep sky objects as many of them appear quite big but faint If you want to use 2 eyepieces such as the Orion Optiluxe 2 eyepieces we recommend that you also purchase a 2 star diagonal for...

Page 13: ...e your atlas might show a globular cluster sitting just above the lid of the Teapot pattern of stars in Sagittarius You then know to point your telescope in that direction to home in on the clus ter w...

Page 14: ...the whole system into the tele scope s focuser drawtube and secure firmly with the setscrew Aim the telescope at the planet or Moon you wish to shoot The image will be highly magnified so you may nee...

Page 15: ...t a life time Store it in a clean dry dust free place safe from rapid changes in temperature and humidity Do not store the tele scope outdoors although storage in a garage or shed is OK Small componen...

Page 16: ...ion any warranted instrument that proves to be defective pro vided it is returned postage paid to Orion Warranty Repair 89 Hangar Way Watsonville CA 95076 If the product is not registered proof of pur...

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