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Instruction Manual
Meade 90AZ-ADRB
90mm (3.5”) Altazimuth Refracting Telescope
© 2007
(800) 626-3233 www.meade.com
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WARNING: NEVER USE A MEADE TELESCOPE TO LOOK AT THE SUN! LOOKING AT OR NEAR THE SUN WILL CAUSE INSTANT AND IRREVERSIBLE DAMAGE TO YOUR EYE. EYE DAMAGE IS OFTEN PAINLESS, SO THERE IS NO WARNING TO THE OBSERVER THAT DAMAGE HAS OCCURRED UNTIL IT IS TOO LATE. DO NOT POINT THE TELESCOPE OR ITS VIEWFINDER AT OR NEAR THE SUN. DO NOT LOOK THROUGH THE TELESCOPE OR ITS VIEWFINDER AS IT IS MOVING. CHILDREN SHOULD ALWAYS HAVE ADULT SUPERVISION WHILE OBSERVING. MEADE LIMITED WARRANTY Every Meade telescope, s
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TABLE OF CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Standard Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Unpacking and Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Altazimuth Mount Movements and Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Red Dot Viewfinder Alignment . . . . . .
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22 14 4 5 6 1 3 2 24 21 18 12 25 23 15 13 11 10 27 17 16 7 9 26 8 2 B A 3 19 20 28 24 3 Figure 1: Meade 90AZ-ADR Altazimuth Refracting Telescope Inset A: Tripod Leg; Inset B: Viewfinder Assembly 1. Eyepiece 14. Objective lens cell 2. Viewfinder 15. Focuser drawtube and thumbscrews 3. Viewfinder collimation screws 16. Vertical slow motion fine adjustment control cable 4. Optical tube assembly 17. Horizontal slow motion fine adjustment control cable 5. Cradle assembly 18. Altazimuth mount/sad
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INTRODUCTION Before you begin, we urge you to take a few minutes to completely read this manual so that you can get the best use of the equipment. This manual details the set-up, operation, specifications and optional accessories of the Meade 90-AZ-ADR altazimuth refracting telescope. Designed for both astronomical and terrestrial observing, the Meade 90-AZ-ADR will be your companion in exploring a universe of celestial and earthly objects. PARTS • Complete optical tube assembly (objective lens
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RED DOT VIEWFINDER ALIGNMENT It is recommended that you perform steps 1 through 5 of this procedure during the daytime and step 6 at night. 1. Loosen the horizontal and vertical locks of your telescope, so that the telescope can move freely. 2. If you have not already done so, place a low-power (e.g., 25mm or 26mm) eyepiece in the eyepiece holder or diagonal prism of your telescope. Point the telescope at an easy-to-sight land object (e.g., the top of a telephone pole or sign). Turn the focuser
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Look for different features on the Moon. The most obvious features are craters. In fact you can see craters within craters. Some craters have bright lines about them. These are called rays and are the result of material thrown out of the crater when it was struck by a colliding object. The dark areas on the Moon are called maria and are composed of lava from the period when the Moon still had volcanic activity. You can also see mountain ranges and fault lines on the Moon. Use a neutral density f
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Optional color filters help bring out detail and contrast of the planets. Meade offers a line of inexpensive color filters. Beyond the Solar System: Once you have observed our own system of planets, it’s time to really travel far from home and look at stars and other objects. You can observe thousands of stars with your telescope. At first, you may think stars are just pinpoints of light and aren’t very interesting. But look again. There is much information that is revealed in stars. The firs
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Barlow lens: You can also change magnification by using a Barlow. Remove the eyepiece from the diagonal mirror and slide in the Barlow. And then place the eyepiece into the Barlow. Tighten the thumbscrews to secure the Barlow lens and the eyepiece in place. A Barlow lens doubles the power of your telescope. Meade offers a complete line of eyepieces for your telescope. Most astronomers have four or five low- power and high power eyepieces to view different objects and to cope with different vie
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SPECIFICATIONS Optical tube focal length . . . . . 900mm Objective lens diameter . . 90mm (3.5") Focal ratio . . . . . . . . . . . . . . . . . . . f/10 Mounting type . . . . . . . . . . . Altazimuth Viewfinder Type . . . . . . . . . . . Red dot What do the specifications mean? Optical tube focal length is simply a measurement of the length of the optical tube. In other words, this is the distance light travels in the telescope before being brought to focus in you eyepiece. Your tube is 900mm lon
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TAKING CARE OF YOUR TELESCOPE Your telescope is a precision optical instrument designed for a lifetime of rewarding viewing. It will rarely, if ever, require factory servicing or maintenance. Follow these guidelines to keep your telescope in the best condition: • Avoid cleaning the telescope’s lenses. A little dust on the front surface of the telescope’s correcting lens will not cause loss of image quality. • When absolutely necessary, dust on the front lens should be removed with very gentle st
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(800) 626-3233 www.meade.com 0207 Looking at or near the Sun will cause irreversable damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.
