Meade Instruments 234001 Le manuel du propriétaire

INSTRUCTION MANUAL

SERIES TELESCOPES

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

at or near the Sun. Do not look through the telescope or

viewfinder

as it is moving. Children should always have

adult supervision while observing.

1

INTRODUCTION

Your telescope is an excellent beginner’s

instrument, and is designed to observe

objects in the sky and also on land. It can

be your personal window on the universe or

allows you to intimately study the behavior of

nesting birds on a distant hillside.

The telescope is shipped with the following

parts:

࠮ Optical tube

࠮ Alt-azimuth mount with slow motion

controls

࠮ Aluminum tripod with integrated accessory

tray

࠮ Three 1.25” eyepieces:

࠮ MA26mm, MA9mm, MA6.3mm

࠮ 90 degree erect-image diagonal prism

࠮ 2X Barlow

࠮ Red-dot viewfinder with bracket

࠮ Smart Phone Adapter

The StarPro™ AZ series of telescopes come

in several sizes (apertures) of optical tubes.

The heart of the optical tubes is the front

lens. It collects and focuses the incoming

light from distant objects.

The lens diameter is one of the most important

pieces of information about the telescope.

The size of the objective lens determines

how much detail you will be able to see in

your telescope.

Each optical tube also has a focal length

which is the distance the light travels inside

the optical tube before it comes to focus.

The focal length information is also

important and will help later on to calculate

magnification.

Setting up your telescope involves these

simple steps:

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Study the picture on the next page and

become acquainted with the parts of your

Figure 1: Meade StarPro™ AZ Refracting Telescope

Inset A: Accessory Tray Assembly

Inset B: Tripod Leg

Inset C: Viewfinder Assembly

FIGURE 1

1. Eyepiece

2. Viewfinder (see Inset C)

3. Viewfinder alignment screws (2) (see Inset C)

4. Optical tube assembly

5. Horizontal lock knob

6. Dovetail mounting rail

7. Tripod legs

8. Accessory tray (see Inset A)

9. Accessory tray lock knob (see Inset A)

10. Red dot viewfinder power switch (see Inset C)

11. Azimuth slow motion control knob

12. Altitude slow motion control knob

13. 90 degree erect-image prism

14. Objective lens cell

15. Focuser drawtube and thumbscrews

16. Alt-azimuth mount

17. Adjustable sliding center leg extension

(see Inset B)

18. Tripod leg lock latch (see Inset B)

19. Dew shield/lens shade

20. Front lens cap (not shown)

21. Focusing knob

22. Viewfinder bracket (see Inset C)

23. Viewfinder bracket locking knob (see Fig. 5)

24. Optical tube attachment knob

25. Focuser lock knob

26. Vertical lock knob

2

Inset B

Inset C

Inset A

Inset

A

:

Accessory

Tray

Assembly

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Inset

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telescope. Then proceed to “Setting up your

tripod.”

SETTING UP YOUR TRIPOD

The tripod is the basic support for your

telescope and comes pre-assembled

from the factory. The tripod height may be

adjusted so that you can view comfortably.

Note: Number in brackets, e.g., (3), refer

to the item numbers in Fig. 1.

1. To setup the tripod, spread the legs out

evenly and place it on a solid surface.

2. Set the height of your tripod:

a. Rotate and loosen the leg lock latch (18)

to unlock the leg lock.

b. Slide the inner portion of the leg (17) in

or out to the desired length. Repeat for

the other two legs.

c. Close the leg lock latch to re-lock the

leg lock.

d. Repeat for the other two legs.

LOCKING THE ACCESSORY TRAY

The accessory tray is integrated into the

tripod leg braces and is a convenient place to

hold eyepieces and other Meade accessories

while observing, such as the Barlow lens.

To lock the accessory tray in place, rotate

the accessory tray locking knob clockwise

until the lock knob wings align with the tray

as shown in Figure 2. The accessory tray in

the locked position will add stability to the

tripod.

To unlock the accessory tray, rotate the

center locking knob counter clockwise until

the locking wings are not aligned with the

leg braces.

ATTACH THE SLOW-MOTION CONTROLS

The slow motion control cables (11 & 12)

allow you to make fine adjustments to the

pointing position of the optical tube. When

viewing objects in the night sky, you will

notice that the object moves slowly in

the eyepiece. This is caused by the

Earths rotation. Use the slow motion

controls to follow (or “track”) these

objects as you observe. Note that each axis

has its own slow motion control which is

independently controlled.

To install, attach the flexible cables (11 & 12)

to the mount as shown in Fig 3. The cables

are secured in place with a firm tightening of

the thumbscrews located at the attachment

3

Fig. 2

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

Fig. 3

Attachment point

Thumbscrew

Slow motion cable

receiver at its mid-point.

3. Turn the optical tube attachment knob (24)

counter-clockwise until firm.

4. To remove the optical tube, first support

the optical tube in one hand. Next, turn the

attachment knob (24) clockwise until the

OTA detaches from the mount. Now slide

the OTA out of the dovetail receiver.

ATTACH THE VIEWFINDER

An eyepiece (1) has a narrow field of view.

The included viewfinder (2) has a wider field

of view and red dot to make it even easier

to locate the viewing object. The red-dot

viewfinder also comes with an easy to install

dovetail bracket.

1. To install the red-dot viewfinder, slide the

viewfinder bracket into the dovetail adapter

(Fig 5).

2. Next, secure the viewfinder in place with

the single locking knob.

Note: The 70mm StarPro AZ viewfinder

attaches to the OTA using two mounting

nuts. Remove the nuts, install the viewfinder,

then re-tighten the nuts to a firm feel.

ATTACH THE DIAGONAL PRISM

AND EYEPIECE

The erect-image diagonal prism reflects

the light from the optical tube to a more

comfortable viewing position. It also corrects

the image orientation so the image is right

side up, and correct left-to-right.

1. To install, slide the diagonal prism (13) into

the focuser draw tube (15).

2. Tighten the draw tube thumbscrew to hold

the diagonal prism securely (15).

3. Next, slide the MA 26mm eyepiece (1) into

diagonal prism.

4. Tighten the diagonal prism thumbscrew to

hold the eyepiece securely.

ends of each cable.

ATTACH THE OPTICAL TUBE

The optical tube gathers distant light which

is focused in the eyepiece. It attaches to the

mount using the optical tube attaching knob

(24) and dovetail mounting rail (6).

1. To attach the optical tube, first locate the

dovetail mounting rail (6) (Fig 4).

2. Using the optical tube attaching knob (24),

place the dovetail into the dovetail

4

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

Fig. 4

Fig. 5

Dovetail Receiver

Attachment

knob (24)

Locking

knob

Dovetail

Rail (6)

TO THE MOUNT

SUN WARNING

NEVER USE YOUR 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 VIEW-

FINDER 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.

ALIGN THE VIEWFINDER

Perform the first part of this procedure during

the daytime and the last step at night.

1. Point the telescope at an easy-to-find

land object such as the top of a telephone

pole or a distant mountain or tower. Look

through the eyepiece in and turn the

focuser knob (21) until the image is sharply

focused. Center the object precisely in the

eyepiece’s field of view.

2. Turn on the red-dot viewfinder by rotating

the large knob under the viewfinder lens

clockwise (10). Turn the knob to adjust the

intensity of the red dot as desired.

3. Look through the viewfinder. Turn one or

both of the viewfinder’s alignment screws

(3) until the red-dot is precisely over

the same object as you centered in the

eyepiece.

4. Check this alignment at night on a

celestial object, such as the Moon or

a bright star, and use the viewfinder’s

alignment screws to make any necessary

refinements.

5. When finished, turn off the viewfinder

by turning the large knob (10) under the

viewfinder lens counter-clockwise until it

clicks.

TO MOVE THE TELESCOPE

Your telescope is alt-azimuth mounted. Alt-

azimuth is just a complicated way of saying

that your telescope moves up and down and

from side to side. Other telescopes may be

mounted in different ways.

1. To move the telescope in the horizontal

direction (azimuth), slightly loosen the

horizontal lock knob (5). Loosening this lock

allows the telescope to be moved from side

to side.

2. To move the telescope in the vertical

direction (altitude), slightly loosen the

vertical lock knob (26) and use the

ota body to make coarse adjustments up

and down.

3. Once an object is found, re-tighten the

horizontal and vertical lock knobs (5 &

6). You can then rotate the slow motion

controls (11 & 12) to make smooth and

precise movements and follow (or “track”)

an object horizontally and vertically as it

moves in the eyepiece.

THE MOST IMPORTANT RULE

We have one very important rule that you

should always follow when using your

THE MEADE 4M COMMUNITY

You haven’t just bought a telescope, you have embarked

on an astronomy adventure that never ends. Share the

journey with others by accepting your free membership

in the 4M community of astronomers.

Go to www.Meade4M.com to activate your

membership today.

5

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

telescope:

Have Fun!

Have a good time when you’re observing.

You may not know everything that there is to

know about a telescope or what all the sights

in the universe are, but that’s OK. Just point

and observe at first.

You will enjoy your telescope even more

as you learn more about it. But don’t be

scared off by difficult terms or complicated

procedures. Don’t panic! Just relax and enjoy

your scope.

You will begin to grow and learn more about

astronomy the more you observe. Browse

the internet or go to the library and read

some books about the stars and planets.

Read about astronomers of old. Many of

them had telescopes no bigger than the one

you are using right now. Galileo, who is one

of the first astronomers to use a telescope,

discovered four of the moons of Jupiter with

a telescope about the same size as yours

(and his didn’t even focus very well!).

OBSERVING

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 and vertical lock knobs (just rotate

to unlock or lock; when locking, only tighten

to a “firm feel,” do not over tighten).

Use the viewfinder: If you have not done so,

align the viewfinder (2) with the telescope’s

eyepiece (1) as described earlier. Look

through the 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 using the

viewfinders red dot.

Look through the eyepiece: Once you have

the object lined up in the viewfinder, look

through the optical tube’s eyepiece. If you

have aligned your viewfinder, you will see the

object in your eyepiece.

6

TOO MUCH POWER?

Can you ever have too much power? If the type of

power you’re referring to is eyepiece magnification,

yes you can! The most common mistake of the

beginning observer is to “overpower” a telescope

by using high magnifications which the telescope’s

aperture and atmospheric conditions cannot

reasonably support. Keep in mind that a smaller,

but bright and well-resolved image is far superior

to one that is larger, but dim and poorly resolved.

Powers above 400x should be employed only under

the steadiest atmospheric conditions.

Focus: Look through the eyepiece and

practice focusing on the object you have

chosen.

Try out the coarse and fine adjustment

controls: Practice using the fine adjustment

control (11 & 12) to move the telescope.

These can come in very handy, especially

when you wish to move the telescope in very

small (fine control) steps.

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

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

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.

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

7

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

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 (Fig 6), 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.

Optional color filters help bring out detail and

contrast of the planets. Meade offers a line of

inexpensive color filters.

Fig. 6

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

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 details 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,

8

What’s Next? 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 nebula

with your scope. Nebula means cloud. Most

nebula are clouds of gas. The two easiest to

see in the Northern Hemisphere are the Orion

nebula during the winter and the Triffid nebula

during the summer. These are large clouds of

gas in which new stars are being born. Some

nebula 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

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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

9

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

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 26mm low-power eyepiece. The

26mm 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.

You can also change magnification by using

a Barlow lens. The Barlow lens included with

your telescope doubles the power of your

telescope. Place the Barlow into the eyepiece

holder before you insert the eyepiece.

Meade offers a complete line of eyepieces

and Barlows 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,

10

STAR CHARTS

Star charts and planispheres are useful for a variety of

reasons. In particular, they are a great aid in planning a

night of celestial viewing.

A wide variety of star charts are available in books, in

magazines, on the internet and on CD Roms. Meade

offers AutoStar Suite

TM

software. Contact your local

Meade dealer or Meade’s Customer Service department

for more information.

Astronomy and Sky and Telescope magazines print

star charts each month for up-to-the-minute maps of

the heavens.

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(11 & 12). 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

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

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 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

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27 Hubble, Irvine, CA 92618

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Executive Secretary

5675 Real del Norte, Las Cruces, NM 88012

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390 Ashton Ave., San Francisco, CA 94112

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65 North Catalina Ave, Pasadena, CA 91106

࠮ 0U[LYUH[PVUHS+HYR:R`(ZZVJPH[PVU0UJ

3225 N. First Avenue, Tucson, AZ 85719-2103

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.

HAVE A GOOD TIME, ASTRONOMY IS FUN!

11

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

SPECIFICATIONS

StarPro™AZ 70 model:

Objective lens diameter 70mm(2.8”)

Optical tube focal length 700mm

Focal ratio f/10

Mounting type Alt-azimuth

Viewfinder Red-dot

StarPro™AZ 80 model:

Objective lens diameter 80mm(3.2”)

Optical tube focal length 900mm

Focal ratio f/11.3

Mounting type Alt-azimuth

Viewfinder Red-dot

StarPro™AZ 90 model:

Objective lens diameter 90mm(3.5”)

Optical tube focal length 600mm

Focal ratio f/6.7

Mounting type Alt-azimuth

Viewfinder Red-dot

StarPro™AZ 102 model:

Objective lens diameter 102mm(4.0”)

Optical tube focal length 660mm

Focal ratio f/6.5

Mounting type Alt-azimuth

Viewfinder Red-dot

12

What do the specifications mean?

Optical tube focal length is the distance

light travels in the telescope before being

brought to focus in you eyepiece. Depending

on the telescope model, the focal length is

either 600mm to 900mm long. Look at the

specification table to find out your telescopes

focal length.

Objective lens diameter is how big the

front lens is on your scope. Telescopes are

always described by how large their objective

lens is. Depending on your telescope model,

the lens diameter is either 70mm - 102mm.

Other telescopes are 50mm, 8 inches, 16

inches, or even 3 feet in diameter. The

Hubble Space 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 shorter the exposure time

is needed when a camera is hooked up to

the telescope. For example, the Infinity 80

telescope has fast focal ratio at f/5.

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

Sometimes, astronomers use focal reducers

to make slow exposure telescopes have

faster focal ratios.

Alt-azimuth 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. For an StarPro

™

AZ 90,

the 26mm eyepiece magnifies an object 23.1

times. The 9mm eyepiece magnifies objects

66.7 times.

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. For the

StarPro

™

AZ 90, you will see that the focal

length of this scope is 600mm. 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: 600 ÷ 13, which

equals 46.15. Round this off to the nearest

whole number and the new 13mm eyepiece

magnifies objects 46 times.

A great accessory for your telescope

is a Barlow lens 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

the magnification is when you use a Barlow,

multiply your eyepiece’s magnification

by two.

Eyepiece’s magnification x 2

=

Magnification with a 2X Barlow lens

For the StarPro

™

AZ 90 the 26mm low-

power eyepiece magnifies an object 23

times. Multiply 23 by 2 and you get 46

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

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

JOIN AN ASTRONOMY CLUB, ATTEND

A STAR PARTY

One of the best ways to increase your knowledge of

astronomy is to join an astronomy club. Check your

local newspaper, school, library, or telescope dealer/

store to find out if there’s a club in your area.

Many groups also hold regularly scheduled Star

Parties at which you can check out and observe

with many different telescopes and other pieces of

astronomical equipment. Magazines such as Sky and

Telescope and Astronomy print schedules for many

popular Star Parties around the United States and

Canada.

13

magnification value!

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:

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A little dust on the front surface of the

telescope’s correcting lens will not cause

loss of image quality.

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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).

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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

14

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

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.

CHANGING THE VIEWFINDER BATTERY

If the viewfinder red dot does not

illuminate, verify the viewfinder is on by

rotating the knob (10) below the viewfinder

lens clockwise. If the red dot does not

illuminate, the battery may need replacing.

To replace the battery, press the left side

of the viewfinder housing labeled “push”.

The battery compartment will slide out on

the right side of the viewfinder (see Fig.

7). Replace the battery with a Lithium

CR2032 battery with the positive side up.

Then push the battery compartment back

into the viewfinder and power on.

15

Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

OBSERVING TIPS

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street and house lights and car headlights.

While this is not always possible, the

darker the site, the better.

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to the darkness before observing. Give

your eyes a rest from observing every ten

or fifteen minutes to relieve eyestrain.

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Experienced observers use red LED

flashlights or tape red cello-phane over

their flashlights to use for setup and map

reading so they don’t have to continually

readjust their eyes to the darkness. Be

careful not to shine bright lights if there are

other observers in the area.

Fig. 7

Push side here to open

battery compartment

CR2032

battery

Battery

compartment

OPTIONAL ACCESSORIES

Additional Eyepieces (1.25”

barrel diameter): For higher or

lower magnifications with the telescopes

that accommodate 1.25” eyepieces, Meade

Series 4000 Super Plössl eyepieces,

available in a wide variety of sizes, provide

a high level of image resolution and color

correction at an economical price. Contact

your Meade Dealer or see the Meade catalog

for more information.

Visit us on the web at www.meade.com.

MEADE CONSUMER SOLUTIONS

If you have a question concerning your telescope,

call Meade Instruments Consumer Solutions

Department at (800) 626-3233. Consumer Solutions

Department hours are 7:00AM to 4:00PM, Pacific

Time, Monday through Friday. Write or call the

Meade Consumer Solutions Department first,

before returning the telescope to the factory, giving

full particulars as to the nature of the problem, as

well as your name, address, and daytime telephone

number. The great majority of servicing issues can

be resolved by telephone, avoiding return of the

telescope to the factory.

MEADE LIMITED WARRANTY

Every Meade telescope and telescope

accessory is warranted by Meade

Instruments Corp (“Meade”) to be free of

defects in materials and workmanship for

a period of ONE YEAR from the date of

original purchase in the U.S.A. Meade will

repair or replace a product, or part thereof,

found by Meade to be defective, provided

the defective part is returned to Meade,

freight-prepaid, with proof of purchase. This

warranty applies to the original purchaser

only and is non-transferable. Meade

products purchased outside North America

are not included in this warranty, but are

covered under separate warranties issued

by Meade international distributors.

RGA Number Required: Prior to the

return of any product or part, a Return

Goods Authorization (RGA) number must

be obtained from Meade by writing, or by

calling (800) 626-3233. Each returned part

or product must include a written statement

detailing the nature of the claimed defect,

as well as the owner’s name, address, and

phone number.

This warranty is not valid in cases

where the product has been abused or

mishandled, where unauthorized repairs

have been attempted or performed, or where

depreciation of the product is due to normal

wear-and-tear. Meade specifically disclaims

special, indirect, or consequential damages

or lost profit which may result from a breach

of this warranty. Any implied warranties

which cannot be disclaimed are hereby

limited to a term of one year from the date of

original retail purchase.

This warranty gives you specific rights. You

may have other rights which vary from state

to state.

Meade reserves the right to change product

specifications or to discontinue products

without notice.

This warranty supersedes all previous Meade

product warranties.

DRAWING OF IMAGE

photocopy this page

OBSERVER:

OBJECT NAME:

DATE & TIME OBSERVED:

CONSTELLATION:

EYEPIECE SIZE:

SEEING CONDITIONS: EXCELLENT GOOD POOR

NOTES:

OBSERVATION LOG

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14-2723-00 REV 01

27 Hubble, Irvine, California 92618

(800) 626-3233 www.meade.com

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Meade Instruments 234001 Le manuel du propriétaire

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