Celestron 71237 Manuel utilisateur

INSTRUCTION MANUAL ENGLISH

SOLAR BinocularS

10x25

71237

10x42

71238

12x50

71239

20x50

71240

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SOLAR BINOCULARS

CELESTRON ECLIPSMART BINOCULARS

Thank you for purchasing a Celestron EclipSmart binocular. We are conﬁdent it will

bring you many years of enjoyable solar observation. This EclipSmart binocular is a

very specialized optical instrument, so please read these instructions before using it.

IMPORTANT SAFETY NOTE: If done incorrectly, direct observation of the Sun can be

harmful to your vision. Never look directly at the Sun without using equipment specially

designed and tested for that purpose. Celestron’s EclipSmart binoculars meet and

conform to the ISO 12312-2 International Standard for safe direct visual observation of

the Sun. EclipSmart binoculars should not be used for solar observation if the objective

ﬁlters have been damaged, tampered with, or removed.

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SOLAR BINOCULARS

SET-UP AND USE OF YOUR CELESTRON ECLIPSMART BINOCULAR

Because of its built-in solar ﬁlters, you won’t be able to see anything other than

the Sun through an EclipSmart binocular. If you do see something other than the

Sun through these binoculars, discontinue use immediately and contact Celestron’s

customer service department.

SET-UP

1. Adjusting the Interpupillary Distance (IPD)

Since the distance between the eyes (speciﬁcally,

the distance between the centers of the pupils)

varies among individuals, you’ll need to adjust the

distance between your binocular’s two eyepieces to

align with your eyes. To do this, lift the binoculars up

to your eyes (using both hands) and move the two

halves of the binoculars by ﬂexing the hinge until

both eyes seem to be fully covered by the eyepieces.

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SOLAR BINOCULARS

2. Adjusting Diopter

EclipSmart binoculars feature a diopter

compensation adjustment mechanism on the right

eyepiece for sharpest focus. If you do not wish to

make an initial diopter correction adjustment, simply

check to make sure the indicator on the right eyepiece

is set to the “zero” mark prior to use. You can ﬁnd

a detailed explanation of how to set the diopter

compensation later in this manual in the “Use”

section, item 3.

3. Positioning the Rubber Eyecups

Leave the rubber eyecups up if you do not wear

eyeglasses, but fold them down if you do wear

eyeglasses to obtain the maximum ﬁeld of view.

Diopter

Adjustment Ring

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SOLAR BINOCULARS

1. Positioning the Binocular

Take up the binocular in both hands and with your view downward toward the ground

in front of you, turn your body so that you are facing the direction of the Sun. Place

the binocular eyecups in front of your eyes so that they are both completely covered.

Then, keeping the eyecups of the binocular squarely in front of your eyes, raise your

head until the solar disk appears in the binocular’s ﬁeld of view. If the solar disk is

not immediately apparent in the ﬁeld of view, slowly scan with the binocular until it

becomes apparent. NEVER REMOVE THE ECLIPSMART BINOCULAR FROM IN

FRONT OF YOUR EYES WHILE YOUR GAZE IS DIRECTED TOWARD THE SUN.

USE

Using EclipSmart binoculars is similar to using a standard binocular—with one

important difference. To ensure your eyes are always protected, position your eyes

behind the eyecups BEFORE raising them into position to view the Sun.

Focus Dial

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SOLAR BINOCULARS

2. Adjusting Focus

To focus your EclipSmart binocular, simply turn the large dial

located between the two barrels until you see a sharp image

of the solar disk.

3. Adjusting Diopter

As solar observation with binoculars does not require the level

of ﬁne detail that other types of astronomical or terrestrial

observation does, most users will not need to make any

adjustments to the diopter compensation of the binocular

other than setting it to the zero (“0”) mark. However, if you would like to ﬁne tune the

diopter for your unique eyesight, follow these steps, making sure that you never allow

yourself to look at the Sun without both eyepieces of the binocular fully in front of

your eyes at all times. Begin with the EclipSmart binocular safely positioned in front

of your eyes and the solar disk in view, without moving the binocular away from your

eyes:

A. Keep both eyes open and use one hand to cover the right objective lens. Adjust

the center focus dial until the image you see through the left eyepiece is sharp.

Do not touch the center focus dial again until this process is complete.

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SOLAR BINOCULARS

B. Move your hand away from the right objective lens and cover the left objective lens.

If the image you see through the right eyepiece is sharp, you are ﬁnished. If it is not,

adjust the diopter correction dial on the right eyepiece until it is.

C. Move your hand away from the left objective lens and assess the image as seen

through both eyepieces simultaneously. The image should now be sharp and

satisfying to view.

OBSERVING THE SUN

SOLAR ECLIPSES

Solar eclipses occur somewhere on Earth at least twice a year. There are two kinds of

eclipses—partial and total.

A partial solar eclipse happens when the Moon passes directly between the Earth and

the Sun and the Moon blocks part of the Sun’s light. If the Moon happens to be near the

far point of its orbit from Earth, a very special form of a partial eclipse occurs, called an

PARTIAL ECLIPSE ANNULAR ECLIPSE TOTAL ECLIPSE

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SOLAR BINOCULARS

annular eclipse. In an annular eclipse, the Moon will block out most of the Sun’s disk,

but leaves a small ring (or annulus) of sunlight surrounding the Moon. A total eclipse

occurs when the moon is close enough to the Earth in its orbit so that it blocks the entire

disk of the Sun from view. The partial phases of a total solar eclipse leading up to totality

are incredible to watch. The Moon will ﬁrst appear as a small dark dent in the edge of

the Sun, growing to a large bite. If you are in the path of totality, the Sun will eventually

become a thin crescent and then disappear completely. For a couple of minutes, daytime

turns to deep twilight and bright stars and planets are visible in the daytime sky. After totality,

the process reverses itself as the Sun re-emerges from behind the Moon. It is a sight that

should not be missed.

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SOLAR BINOCULARS

Sunspots

Sunspots are dark spots that appear on the photosphere, or visible “surface” of the Sun.

They usually have a dark core, called the umbra, surrounded by a lighter border, called

the penumbra. They form when large disturbances in the Sun’s magnetic ﬁeld cool

portions of the photosphere. Sunspots are relatively cool, being only 6,000°F (3,300°C)

compared to the normal 10,000°F (5,500°C) of the rest of the photosphere. Although

these spots appear to be almost black, they are actually quite bright. If it were possible

to remove a sunspot from the Sun and put it in the night sky, it would shine brighter

than the Full Moon. They only appears to be “dark” when compared to the rest of the

photosphere.

Sunspots can be big. Very big. They can range in size from 10 to 100,000 miles (16

to 160,000 km) in diameter. To put that into perspective, the Earth is only 8,000 miles

(12,800 km) in diameter! Compare sunspot sizes to the relative size of the Earth in the

image on the next page to better grasp the immense size of the Sun and share that

WOW factor with neighbors, friends, and family.

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SOLAR BINOCULARS

Sunspots usually appear in pairs but can

also appear in very large groups. They can

last from a few days to several weeks and

can change their shape, size and number as

they slowly rotate across the face of the Sun.

It will take about two weeks for a sunspot

group to cross the Sun. Try looking at the

Sun every day and draw a picture of what you

see. At the end of the week, compare your

drawings and you’ll see how sunspots evolve.

PLANETARY TRANSIT

Planetary transits occur when the planet

Mercury or Venus passes between the Sun and Earth, allowing observers on Earth to

track the planet’s dark disk as it crosses the face of the Sun. This is an extremely rare

event, occurring only four times over the next 50 years.

1.3 MILLION EARTHS CAN

FIT INSIDE THE SUN

EARTH

JUPITER

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