Meade Telescope 90AZ ADRB User Manual

Instruction Manual  
Meade 90AZ-ADRB  
90mm (3.5”) Altazimuth Refracting Telescope  
© 2007  
(800) 626-3233  
 
TABLE OF CONTENTS  
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5  
Standard Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5  
Unpacking and Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5  
Altazimuth Mount Movements and Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5  
Red Dot Viewfinder Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6  
Using the Telescope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6  
Some Observing Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8  
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10  
What Do the Specifications Mean? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10  
Use the Specifications to Calculate the Magnification of your Eyepiece . . . . .10  
Taking Care of Your Telescope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11  
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11  
– 3 –  
 
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  
2. Viewfinder  
14. Objective lens cell  
15. Focuser drawtube and thumbscrews  
3. Viewfinder collimation screws  
4. Optical tube assembly  
5. Cradle assembly  
6. Cradle lock knob (not visible)  
7. Tripod legs  
16. Vertical slow motion fine adjustment control cable  
17. Horizontal slow motion fine adjustment control cable  
18. Altazimuth mount/saddle plate slot  
19. Adjustable sliding center leg extension  
20. Tripod leg lock knob (see inset A)  
21. Dew shield/lens shade  
8. Leg brace  
9. Leg brace supports  
10. Vertical lock knob  
11. Horizontal lock knob  
12. Mounting locks knob  
13. Diagonal mirror  
22. Front lens cap (not visible in photo)  
23. Focusing knob  
24. Red dot VF bracket with mounting thumbscrews  
25. Alt/az mount  
26. Accessory tray  
27. Wing nut and bolts (leg attachment point)  
28. Red dot intensity slider  
– 4 –  
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.  
 
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 diameter = 90mm; focal length = 900mm)  
Full-length, fully adjustable, aluminum tripod and accessory tray.  
MA25mm (36X), MA9mm eyepieces (100X), 1.25" O.D. “Outside Diameter”  
Diagonal mirror (1.25" O.D.)  
Red dot viewfinder  
Altazimuth mount  
Hardware package with bolts, wingnuts, nuts, etc. necessary for assembly  
Astronomy software (separate instructions supplied in software package) and instructional DVD  
ASSEMBLY  
You will need a Phillips-head screwdriver to assemble the tripod.  
1. Remove and identify the telescope’s components, using the listing above.  
2. Attach the 3 aluminum tripod legs (7, Fig. 1) to the base of the altazimuth mount (25, Fig. 1) with  
the 3 leg brace supports (8, Fig. 1) facing inward. Line up the holes of the tripod legs with the holes  
on the mount base attachment (27, Fig. 1) and thread the three included bolts through the holes.  
Thread the wing nuts over the bolts and hand-tighten to a firm feel. Stand the telescope upright  
and spread the tripod legs evenly apart so that the accessory tray can be positioned for attachment  
to the leg braces.  
3. The tray helps stabilize the tripod and is also a convenient holder of eyepieces and other Meade  
accessories, such as the Barlow lens. Line up the holes at the end of one of the leg brace supports  
(9, Fig. 1) with the holes in one of the leg braces (8, Fig. 1). Thread one of the one-half inch bolts  
through the holes. Thread a hex nut over the end of the bolt. Finger tighten the bolt and hex nut.  
See Fig. 2. Repeat with the two other leg braces.  
4. Thread the accessory tray (26, Fig. 1) over the center  
Finger tighten the  
mounting bolt and tighten to a firm feel.  
hex nut  
5. Extend the sliding center portion of the adjustable  
height tripod leg (19, Fig. 1) to the desired length for  
all 3 legs. Lock the tripod legs by tightening the leg  
lock thumbscrew (20, Fig. 1) to a firm feel. See Inset  
Fig. 2  
A.  
6. If the cradle ring assembly (5, Fig. 1) did not come attached to the optical tube (4, Fig. 1), loosen  
the cradle ring lock knob (6, Fig. 1) and open the cradle rings. Place the optical tube roughly in the  
center of the cradle rings and close the rings over the tube. Tighten the cradle ring lock knobs to  
a firm feel. Do not overtighten—note that you may wish to change the position of the tube to gain  
a more comfortable observing position of the eyepiece assembly.  
7. Position the cradle ring’s mounting plate into the saddle plate slot (18, Fig. 1). Tighten the mounting  
lock knob (12, Fig. 1) to a firm feel.  
8. Attach the red dot viewfinder bracket (24, Fig. 1) to the telescope using the 2 supplied  
thumbscrews. The thumbscrews thread over the 2 bolts located on the main tube.  
11. Insert the diagonal mirror (13, Fig. 1) into the focuser drawtube (15, Fig. 1) and the MA 25mm  
eyepiece (1, Fig. 1) into the diagonal mirror. Tighten the respective thumbscrews to a firm feel.  
12. The telescope is now completely assembled. To move the telescope and point it from one object  
another, first slightly loosen the vertical lock, then loosen the horizontal lock (11, Fig. 1).  
Loosening these locks allows the telescope to be moved freely (vertically or horizontally) in any  
direction so that the telescope can be positioned to center a terrestrial or celestial object in the  
telescopic field. Once an object is found, the vertical lock knob (10, Fig. 1) can be tightened and  
the vertical slow-motion fine-adjustment control knob (16, Fig. 1) can then be used to make very  
smooth and accurate tracking in the vertical axis.  
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.  
– 5 –  
 
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 knob to focus sharply the image  
in the eyepiece. Precisely center the object in the eyepiece.  
3. Re-tighten the horizontal and vertical locks so that the telescope does not move during the rest of  
the procedure.  
4. Slide the intensity slider (28, Fig. 1) to the right to turn the red dot viewfinder On.  
5. Looking through the viewfinder. Turn the viewfinder’s two alignment screws (3, Fig. 1) until the  
viewfinder’s red dot points precisely at the same object centered in the eyepiece. The red dot  
viewfinder is now aligned to the main telescope.  
6. Check this alignment on a celestial object, such as the Moon or a bright star, and make any  
necessary refinements.  
Using the Red Dot Viewfinder  
1. Slide the intensity switch one position to the right to turn on the red dot viewfinder.  
2. Look through red dot viewfinder; you will see a red dot projected at one end.  
3. Slide the intensity switch one more position to the right. Note that the red dot has increased in  
intensity. Set the intensity switch to a position that is comfortable for your eyesight and the  
darkness of your observing site.  
4. Slide the intensity switch all the way to the left to turn off the red dot viewfinder. Remember to turn  
the device off at the end of your viewing session.  
USING THE TELESCOPE  
Observe during the daytime: Try out your telescope during the daytime at first. It is easier to learn how  
it operates and how to observe when it is light.  
Pick out an easy object to observe: A distant mountain, a large tree, a lighthouse or skyscraper make  
excellent targets. Point the optical tube so it lines up with your object.  
Unlock the lock knobs: To move the telescope, you will need to unlock the horizontal (12, Fig. 1) and  
vertical (11, Fig. 1) lock knobs (just rotate to unlock or lock; when locking, only tighten to a “firm feel,”  
do not overtighten).  
Use the red dot viewfinder: If you have not done so, align the red dot viewfinder (2, Fig. 1) with the  
telescope’s eyepiece (1, Fig. 1) as described earlier.  
Look through the red dot viewfinder until you can see the object. It will be easier to locate an object  
using the viewfinder rather than locating with the eyepiece. Line up the object with the viewfinder’s red  
dot.  
Look through the eyepiece: Once you have the object lined up in the red dot viewfinder, look through  
the optical tube’s eyepiece. If you have aligned your viewfinder, you will you see the object in your  
eyepiece.  
Focus: Look through the eyepiece and practice focusing on the object you have chosen.  
Observe the Moon: When you feel comfortable with the viewfinder, the eyepieces, the locks and the  
adjustment controls, you will be ready to try out the telescope at night. The Moon is the best object to  
observe the first time you go out at night. Pick a night when the Moon is a crescent. No shadows are  
seen during a full Moon, making it appear flat and uninteresting.  
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.  
– 6 –  
 
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 filter (often called a “moon filter”) when observing the Moon. Neutral density  
filters are available from Meade as an optional accessory and enhance contrast to improve your  
observation of lunar features.  
Spend several nights observing the Moon. Some nights, the Moon is so bright that it makes other  
objects in the sky difficult to see. These are nights that are excellent for lunar observation.  
Observe the Solar System: After observing the Moon, you are ready to step up to the next level of  
observation, the planets. There are four planets that you can easily observe in your telescope: Venus,  
Mars, Jupiter and Saturn.  
Nine planets (maybe more!) travel in a fairly circular pattern around our Sun. Any system of planets  
orbiting one or more stars is called a solar system. Our Sun, by the way, is a single, yellow dwarf star.  
It is average as far as stars go and is a middle aged star.  
Beyond the planets are clouds of comets, icy planetoids and other debris left over from the birth of our  
sun. Recently astronomers have found large objects in this area and they may increase the number of  
planets in our solar system.  
The four planets closest to the Sun are rocky and are called the inner planets. Mercury, Venus, Earth  
and Mars comprise the inner planets. Venus and Mars can be easily seen in your telescope.  
Venus is seen before dawn or after sunset, because it is close to the Sun. You can observe Venus  
going through crescent phases. But you cannot see any surface detail on Venus because it has a very  
thick atmosphere of gas.  
When Mars is close to the Earth, you can see some details on Mars, and sometimes even Mars’ polar  
caps. But quite often, Mars is further away and just appears as a red dot with some dark lines  
crisscrossing it.  
Jupiter, Saturn, Uranus, Neptune and Pluto comprise the outer planets. These planets, except for  
Pluto, are made mostly of gases and are sometimes called gas giants. If they had grown much bigger,  
they may have become stars. Pluto is made mostly of ice.  
Jupiter is quite interesting to observe. You can see bands across the face of Jupiter. The more time  
you spend observing these bands, the more detail you will be able to see.  
One of the most fascinating sights of Jupiter are its moons. The four largest moons are called the  
Galilean moons, after the astronomer Galileo, who observed them for the first time. If you’ve never  
watched the Galilean moons in your telescope before, you’re missing a real treat! Each night, the  
moons appear in different positions around the Jovian sky. This is sometimes called the Galilean  
dance. On any given night, you might be able to see the shadow of a moon on the face of Jupiter, see  
one moon eclipse another or even see a moon emerge from behind Jupiter’s giant disk. Drawing the  
positions of the moons each night is an excellent exercise for novice astronomers.  
Any small telescope can see the four Galilean moons of Jupiter, plus a few others, but how many  
moons does Jupiter actually have? No one knows for sure! Nor are we sure how many Saturn has  
either. At last count, Jupiter had over 60 moons, and held a small lead over Saturn. Most of these  
moons are very small and can only be seen with very large telescopes.  
Probably the most memorable sight you will see in your telescope is Saturn. Although you may not see  
many features on the surface of Saturn, its ring structure will steal your breath away. You will probably  
be able to see a black opening in the rings, known as the Cassini band.  
Saturn is not the only planet that has rings, but it is the only set of rings that can be seen with a small  
telescope. Jupiter’s rings cannot be seen from Earth at all—the Voyager spacecraft discovered the ring  
after it passed Jupiter and looked back at it. It turns out, only with the sunlight shining through them,  
can the rings be seen. Uranus and Neptune also have faint rings.  
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.  
– 7 –  
 
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 first thing you will notice is that not all stars are the same colors. See if you can find blue, orange,  
yellow, white and red stars. The color of stars sometimes can tell you about the age of a star and the  
temperature that they burn at.  
Other stars to look for are multiple stars. Very often, you can find double (or binary) stars, stars that  
are very close together. These stars orbit each other. What do you notice about these stars? Are they  
different colors? Does one seem brighter than the other?  
Almost all the stars you can see in the sky are part of our galaxy. A galaxy is a large grouping of stars,  
containing millions or even billions of stars. Some galaxies form a spiral (like our galaxy, the Milky Way)  
and other galaxies look more like a large football and are called elliptical galaxies. There are many  
galaxies that are irregularly shaped and are thought to have been pulled apart because they passed  
too close to—or even through—a larger galaxy.  
You may be able to see the Andromeda galaxy and several others in your telescope. They will appear  
as small, fuzzy clouds. Only very large telescope will reveal spiral or elliptical details.  
You will also be able to see some nebulas with your scope. Nebula means cloud. Most nebulas are  
clouds of gas. The two easiest to see in the Northern Hemisphere are the Orion nebula during the  
winter and the Trifid nebula during the summer. These are large clouds of gas in which new stars are  
being born. Some nebulas are the remains of stars exploding. These explosions are called  
supernovas.  
When you become an advanced observer you can look for other types of objects such as asteroids,  
planetary nebula and globular clusters. And if you’re lucky, every so often a bright comet appears in  
the sky, presenting an unforgettable sight.  
The more you learn about objects in the sky, the more you will learn to appreciate the sights you see  
in your telescope. Start a notebook and write down the observations you make each night. Note the  
time and the date.  
Use a compass to make a circle, or trace around the lid of a jar. Draw what you see in your eyepiece  
inside the circle. The best exercise for drawing is to observe the moons of Jupiter every night or so.  
Try to make Jupiter and the moons approximately the same size as they look in your eyepiece. You  
will see that the moons are in a different position every night. As you get better at drawing, try more  
challenging sights, like a crater system on the moon or even a nebula.  
Go your library or check out the internet for more information about astronomy. Learn about the basics:  
light years, orbits, star colors, how stars and planets are formed, red shift, the big bang, what are the  
different kinds of nebula, what are comets, asteroids and meteors and what is a black hole. The more  
you learn about astronomy, the more fun, and the more rewarding your telescope will become.  
SOME OBSERVING TIPS  
Eyepieces: Always begin your observations using the 25mm low-power eyepiece. The 25mm  
eyepiece delivers a bright, wide field of view and is the best to use for most viewing conditions. Use  
the high-power 9mm eyepiece to view details when observing the Moon and planets. If the image  
become fuzzy, switch back down to a lower power. Changing eyepieces changes the power or  
magnification of your telescope.  
By the way, you might have noticed something strange when you looked through your eyepiece.  
Although the image is right-side up, it is reversed. That means reading words can be a problem. But it  
has no affect on astronomical objects. If you wish to have a fully corrected image, check out Meade’s  
optional Erecting Prism in the Optional Accessory section.  
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.  
– 8 –  
 
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 viewing conditions.  
Objects move in the eyepiece: If you are observing an astronomical object (the Moon, a planet, star,  
etc.) you will notice that the object will begin to move slowly through the telescopic field of view. This  
movement is caused by the rotation of the Earth and makes an object move through the telescope’s  
field of view. To keep astronomical objects centered in the field, simply move the telescope on one or  
both of its axes—vertically and/or horizontally as needed—try using the telescopes coarse and fine  
adjustment controls. At higher powers, astronomical objects will seem to move through the field of view  
of the eyepiece more rapidly.  
Place the object to be viewed at the edge of the field and, without touching the telescope, watch it drift  
through the field to the other side before repositioning the telescope so that the object to be viewed is  
again placed at the edge of the field, ready to be further observed.  
Vibrations: Avoid touching the eyepiece while observing through the telescope. Vibrations resulting  
from such contact will cause the image to move. Avoid observing sites where vibrations cause image  
movement (for example, near railroad tracks). Viewing from the upper floors of a building may also  
cause image movement.  
Let your eyes “dark-adapt”: Allow five or ten minutes for your eyes to become “dark adapted” before  
observing. Use a red-filtered flashlight to protect your night vision when reading star maps, or  
inspecting the telescope. Do not use use a regular flash-light or turn on other lights when observing  
with a group of other astronomers. You can make your own red filtered flashlight by taping red  
cellophane over a flashlight lens.  
Viewing through windows: Avoid setting up the telescope inside a room and observing through an  
opened or closed window pane. Images may appear blurred or distorted due to temperature  
differences between inside and outside air. Also, it is a good idea to allow your telescope to reach the  
ambient (surrounding) outside temperature before starting an observing session.  
When to observe: Planets and other objects viewed low on the horizon often lack sharpness—the  
same object, when observed higher in the sky, will appear sharper and have greater contrast. Try  
reducing power (change your eyepiece) if your image is fuzzy or shimmers. Keep in mind that a bright,  
clear, but smaller image is more interesting than a larger, dimmer, fuzzy one. Using too high a power  
eyepiece is one of the most common mistakes made by new astronomers.  
Dress Warm: Even on summer nights, the air can feel cool or cold as the night wears on. It is important  
to dress warm or to have a sweater, jacket, gloves, etc., nearby.  
Know your observing site: If possible, know the location where you will be observing. Pay attention to  
holes in the ground and other obstacles. Is it a location where wild animals, such as skunks, snakes,  
etc., may appear? Are there viewing obstructions such as tall trees, street lights, headlights and so  
forth? The best locations are dark locations, the darker the better. Deep space objects are easiest to  
see under dark skies. But it is still possible to observe even in a city.  
Surf the Web and visit your local library: The internet contains a huge amount of astronomical  
information, both for children and adults. Check out astronomy books from your library. Look for star  
charts—these are available on a monthly basis in Astronomy and Sky and Telescope magazines.  
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.  
– 9 –  
 
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 long.  
Objective lens diameter is how big the lens is on your scope. Telescopes are always described by how  
large their objective lens is. Your telescope is 90mm or 3.5 inches. Other telescopes are 90mm, 8  
inches, 16 inches, or even 3 feet in diameter. The Hubble Telescope’s objective lens has a diameter of  
2.4 meters (that’s 7.8 feet across!).  
The focal ratio helps determine how fast the photographic speed of a telescope is. The lower the focal  
ratio number, the faster the exposure. f/5 is faster than f/10. The faster the ratio, the faster exposure  
time is needed when a camera is hooked up to the telescope. Your telescope has slower focal ratio at  
f/10. Sometimes, astronomers use focal reducers to make slow exposure telescopes have faster focal  
ratios.  
Altaz mounting simply means your telescope moves up and down (altitude or “alt”), and side to side,  
(azimuth or “az”). Other mounting configurations are available for other telescopes, such as equatorial  
mounting.  
USE THE SPECIFICATIONS TO CALCULATE THE MAGNIFICATION OF YOUR EYEPIECE  
The power of a telescope is how much it magnifies objects. Your 25mm eyepiece magnifies an object  
36 times. Your 9mm eyepiece magnifies objects 100 times. But if you obtain other eyepieces, you can  
calculate how much magnification they have with your telescope. Just divide the focal length of the  
telescope by the focal length of the eyepiece.  
FOCAL LENGTH OF THE TELESCOPE ÷ FOCAL LENGTH OF THE EYEPIECE = MAGNIFICATION  
Look at the specifications. You will see that the focal length of your scope is 900mm. Let’s say that you  
have obtained a 13mm eyepiece. You can tell that what the focal length of your eyepiece is as it is  
always printed on the side of an eyepiece. Divide: 900 ÷ 13, which equals 69.2. Round this off to the  
nearest whole number and your new eyepiece magnifies objects 69 times.  
If you use a Barlow lens with one of your eyepieces, it doubles the magnification of your eyepiece.  
Other types of Barlows can triple or further increase the power of an eyepiece. To find out how much  
your magnification is when you use a Barlow, multiply your eyepiece’s magnification by two.  
EYEPIECES MAGNIFICATION X 2 = MAGNIFICATION WITH A 2X BARLOW LENS  
Your 25mm low-power eyepiece magnifies an object 36 times. Multiply 36 by 2 and you get 72 times  
magnification with a Barlow.  
It’s worth repeating: Keep in mind that a bright, clear, but smaller image is more interesting than a  
larger, dimmer, fuzzy one. Using too high a power eyepiece is one of the most common mistakes made  
by new astronomers. So don’t think that higher magnification is necessarily better—quite often the best  
view is with lower magnification value!  
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.  
– 10 –  
 
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 strokes of a  
camel hair brush or blown off with an ear syringe (available at most pharmacies).  
• Fingerprints and organic materials on the front lens may be removed with a solution of 3 parts  
distilled water to 1 part isopropyl alcohol. You may also add 1 drop of biodegradable dishwashing  
soap per pint of solution. Use soft, white facial tissues and make short, gentle strokes. Change  
tissues often.  
CAUTION: Do not use scented or lotioned tissues or damage could result to the optics. DO NOT use  
a commercial photographic lens cleaner.  
OPTIONAL ACCESSORIES  
#928 45° Erecting Prism (1.25 O.D.): Correctly orients the telescopic image during terrestrial  
observing and yields an image position at a 45° angle to the main telescope tube, resulting in a more  
comfort-table observing position in most cases.  
Additional Eyepieces (1.25" barrel diameter): For higher or lower magnifications with the telescopes  
that accommodate 1.25" eyepieces, Meade 4-element Series 4000 Super Plössl eyepieces yield wide  
fields of view with excellent edge-of-field corrections and are available in a range of focal lengths  
including 6.4, 9.7, 12.4, 15, 20, 26, 32, and 40mm.  
#126 Barlow Lens: Doubles the magnification of your eyepieces. For example, if your eyepiece has  
36 times magnification, a Barlow gives you a 72 times magnification. Place your Barlow into the  
eyepiece holder followed by your eyepiece.  
Contact your Meade Dealer or see the Meade catalog for more information. Visit us on the web at:  
meade.com.  
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.  
– 11 –  
 
(800) 626-3233  
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.  
 

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