Meade Instruments 234001 Le manuel du propriétaire

Catégorie
Télescopes
Taper
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
I
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se
t
B
:
T
r
i
po
d
L
e
g
In
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t
C
: View
f
inder Assembl
y
Inset
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
SURF THE WEB
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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
ASTRONOMY RESOURCES
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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
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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
©2018 Meade Instruments Corp. All rights reserved.
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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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