Celestron 71189-B User manual

oceAnA 7x50 binoculAr Model # 71189-b

button cell

ENGLISH

Adjusting the interpupillAry distAnce (ipd)

Since the distance between the eyes (specifically, the distance between the
centers of the pupils) varies among individuals, the two eyepieces of the
binoculars must be correctly aligned (adjusted). This is called adjusting the
interpupillary distance. To adjust this distance, lift the binoculars up to your eyes
(using both hands) and look through them at an object in the distance. Move
the two halves of the binoculars about the hinge until you see one clear circle of
image through both eyes.

IPD Scale

t

t

t

t

Adjusting Focus

This binocular has an individual focus system which requires that you focus each
eyepiece for the clearest and sharpest views. Start by selecting an object to look
at – (1) Close your right eye and rotate the left diopter until the object appears
sharp and clear; (2) Open your right eye and close your left eye and rotate the
right diopter until the object appears sharp and clear; (3) With both eyes open
the object should be sharp and clear; (4) Focusing on other objects requires that
you follow the steps above; (5) To return to the original object, note the diopter
adjustment scale settings so you can quickly obtain the best focus position.

Hint: Eyeglasses worn for nearsightedness should be worn when using binoculars
as you may not be able to reach a sharp focus at infinity without them.

set the rubber eyecups

Keep 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.

pArts oF the binoculAr

1. Eyepieces

2. Main Body

3. Objective Lenses

4. Body Shaft

5. IPD Scale

6. Tripod Adapter Threads

7. Rubber Eyecups

7

13

8

9

10

3

11

8. Compass Window

9. Button for Compass
Illuminator

10. Battery Compartment

11. Objective Lens Caps

12. Eyepiece Protective Cap

13. Diopter Adjustment Ring

1

7

13

5

6

12

4

2

11

instAlling the bAtteries – two lr43

The batteries included with your binocular are for illuminating the compass,
so you can see it easily in the dark. You need to install the batteries which are
located in the case pocket. Unscrew the battery cap by hand and then remove
the screw with a coin or screwdriver. The batteries are to be installed with the
positive (+) side facing up towards you. Replace the screw and battery cap. If
you will not be using the binocular for a long period of time (a few months or
more), you should take the batteries out to preserve their life.

t

t

t

using the reticle As A MeAsuring device

View Angle

View Angle of an object is the angle between the rays
from the binocular to its edges. Usually, this angle is
measured at the horizontal or vertical direction, and
defined as Horizontal View Angle and Vertical
View Angle.

A mil’s reticle (shown to the right) that has a horizontal
and vertical scale can measure the viewing angle of
an object. The Celestron binocular uses 10 mils for each
number (1,2,3,… as shown here).

MeAsuring the horizontAl View Angle

When the Horizontal View Angle is smaller than the horizontal
scale range (-40~+40 mils) inside the binocular, aim one
edge of the object at a horizontal scale line (the center or
the outmost line is selected according to the image size
of the object usually) and read its value. Then read the
value of the scale at which another edge was located.
Add these two values and this is the measured Horizontal
View Angle. The Horizontal View Angle of the target
(sailboat) is 2 decade mils (20 mils), and the Horizontal View
Angle between the targets is 4 decade mils (40 mils).

When the Horizontal View Angle is larger than the horizontal scale range
(-40~+40 mils), use vertical line splits (for example: mast, sail, etc.) on the object
can be selected to make the necessary estimated measurements in a step by
step fashion.

MeAsuring the VerticAl View Angle

Vertical View Angle measurement is similar to measuring
the Horizontal View Angle. When the Vertical View
Angle measurement is small, aim the intersecting point
of the vertical and horizontal lines of the reticle at
the lower part of the object and read the scale value
at the top of the object. The angle included between
the upper and lower parts of the target (lighthouse) is 6
decade mils (60 mils).

When the Vertical View Angle is larger than the vertical scale range (80 mils), it
can be measured in steps, and the angle can be obtained by summing up the
value of each step.

using the reticle to MeAsure DistAnce

The distance measurement of a target can be calculated by using the mil reticle.
The formula of distance measurement: L(km) = H (m)/ω

L — the distance between the observer and the object (km)
H — the height of the object (m)
ω — the View Angle of the object measured with the reticle
of the binocular (mil).

When measuring the distance, estimate the width or height of the object and
next measure the View Angle of the object. Accordingly, you can calculate the
distance between the observer and the object using the formula.

For example:
There is an adult whose height is 1.70 m. (H = 1.70 m)
The Vertical View Angle of the adult is 4 decade mils (40 mils)
L = H/ω = 1.7/40 = 0.0425 km = 42.5 m
Therefore: the distance between the observer and the adult is 42.5 m.
(for feet conversion, multiply 42.5 by 3.28).

H

ω

L

using the cAlculAtor diAl As A MeAsuring device

The Calculator Dial can be used to determine distance quickly and easily without
calculation. The Calculator Dial includes a triangular Angle Index Mark marked
“ANGLE”, a rotational Active Ring and a Fixed Scale marked “DISTANCE”.
There are two scales in the Active Ring, one is for View Angle and the other is
Size marked “OBJECT SIZE”.

First, measure the View Angle value of an object, and rotate the Active Ring and
place this value at the Angle Index Mark. Then, find the division indicating the
size of the object (see formula below), it indicates a point at the Fixed Scale.
Look at the Fixed Scale, the distance is shown at that point on the Fixed Scale.

using the coMpAss

The Compass is aligned with the vertical range finding scale. The Compass by
itself will only indicate direction to or from an object but not relative position. To
determine position, you need a map or chart and a protractor.

The azimuth angle can be measured through the analog Compass which is built
into the binocular. It shows the azimuth of the object
relative to the observer. Each graduation of the
Compass equals one degree of angle. When the
object lies north from you, the Compass reads
360°. The Compass degrees will increase
when you turn it clockwise. 90° means the
object lies in the east from you, 180° means
the south and 270° means the west.

In order to insure precise angle measurements,
the binocular should be kept horizontal and level when
reading the compass, and the object should lie in the middle of the reticle.

Note: When using the Compass, always keep in mind the local variation
between magnetic north (the Compass reading) and true north. Do not put
your finger or hand over the white button (compass window), as it allows light
to enter the binocular, so the Compass readings can be seen.

North

360º

270º 90º

180º

South

EastWest

AttAching your binoculArs to A tripod

These binoculars feature a built-in tripod adapter fitting which is a threaded
screw hole underneath a cap. To attach an optional binocular tripod adapter,
remove the cap and then thread the screw from the binocular tripod adapter
into the threaded screw hole. The other end of the binocular tripod adapter
attaches to a photographic tripod. Mounting binoculars this way allows for
added stability and comfort.

t

t

t

For example: You observe a lighthouse, and its measured Vertical View Angle is
6 decade mils. You need to rotate the Active Ring and place the division marked
“6” in the View Scale at the Angle Index Mark. Its assuming height is 12 m, the
division marked “12” in the Size Scale points to the division marked “200” in the
Fixed Scale. This tells us that the lighthouse’s distance is 200 m from us.

The Size Scale and Fixed scale of the Calculator Dial are in a “ratio” to each
other. When your observing object is too large or too small, you can zoom
it tenfold or discretionarily, and zoom the measuring result in the same way.
Thus, you can get more convenience, especially when you aren’t familiar with
diversified units.

how to MeAsure An objects size
(height And width)

According to the formula for distance measurement, you can calculate the
height using:

H = L × ω. (Height = Distance x View Angle)
When measuring the size, you first estimate the distance to the object and
then measure the View Angle. With these measurements, you can calculate the
height of the target using the formula.

For example:
The distance is 0.6km between the observer and the object. You can measure

that the Horizontal View Angle is 6 decade mils (60 mils) and the Vertical View
Angle is 3 decade mils (30 mils). So, using the formula you can get:

The height: H = 0.6 × 30 = 18 m (for feet divide 18 by 3.28)
The width: H = 0.6 × 60 = 36 m

CARE AND CLEANING: Binoculars do not need routine maintenance other
than making sure that the objective lenses and eyepieces are kept clean. If
repairs become necessary, they should be serviced by the manufacturer or
a qualified binocular repair company. If your binocular is roughly handled or
dropped, there is a good chance that the collimation (alignment of the optics)
will be out and they should be serviced. Dirty objective lenses and/or eyepieces
mean less light transmission and loss of brightness, as well as unsharp images.
Keep your optics clean! When not using your binocular, store it in the soft case
provided after putting the lens caps on. Avoid touching the glass surfaces,
however, if fingerprints (which contain mild acid) do get on the glass, they
should be cleaned as soon as possible to avoid damaging the coatings. To clean
the optical surfaces, we recommend a lens/optics cleaning kit available at most
photo or optical shops. Follow the instructions provided with the kit closely. If
you have a lot of dust or dirt accumulated, brush it off gently with a camel’s
hair brush and/or utilize a can of pressurized air before using the cleaning kit.
Alternately, you could use the Celestron LensPen (# 93575) made especially for
cleaning binoculars. Never attempt to clean your binocular internally or try to
take it apart!

CAUTION! Viewing the Sun may cause permanent eye damage. Do not view
the Sun with your binocular!

PROBLEMS OR REPAIR: If warranty problems arise or repairs are necessary,
contact the Celestron technical support department.

2835 Columbia Street • Torrance, CA 90503 U.S.A. • Tel: [phone]
©2012 Celestron • All rights reserved. • Printed in China • 03-12

juMelles oceAnA 7x50 Modèle n°71189-b

lr

FRANÇAIS

réglAge de lA distAnce interpupillAire (dip)

Étant donné que la distance entre les yeux (plus précisément,
la distance entre le centre des deux pupilles) varie d’une personne
à l’autre, il est nécessaire de parfaitement aligner (régler) les deux
oculaires des jumelles. Cette distance est désignée sous le nom de
distance interpupillaire. Pour la régler, mettez les jumelles devant
vos yeux (en les tenant des deux mains) et regardez un objet éloigné
avec. Déplacez les deux tubes droits des jumelles au niveau de la
charnière jusqu’à ce que vous aperceviez un cercle d’image net avec
les deux yeux.

t

Ichelle de Distance Interpupillaire

t

t

t

Ajuster lA Mise Au point

Ces jumelles sont équipées d’un système de mise au point individuel. Ceci veut
dire que vous devrez ajuster chaque oculaire individuellement pour obtenir la vue
la plus Claire et nette. Commencez par choisir un sujet d’observation puis – (1)
fermez votre œil droit et faites pivoter la molette gauche jusqu’à ce que l’image
soit claire et nette; (2) ouvrez l’œil gauche et fermez le droit puis faites pivoter
la molette droite jusqu’à ce que l’image soit claire et nette; (3) ouvrez les deux
yeux et assurez-vous que l’image est claire et nette; (4) effectuez cette opération
à chaque nouveau sujet d’observation; (5) pour revenir à l’objet précédent, notez
les positions de chaque molette de manière à pouvoir effectuer la mise au point le

plus rapidement possible.

instAllAtion des œilletons en cAoutchouc

Gardez les œilletons en caoutchouc en position relevée si vous ne portez pas de
lunettes, mais abaissez-les dans le cas contraire pour obtenir un champ de vision
maximum.

coMposAnts des juMelles

1. Oculaires

2. Corps principal

3. Objectifs

4. Axe du corps

5. Échelle DIP

6. Molette de mise au point

7. Œilletons en caoutchouc

7

13

8

9

10

3

11

8. Vitre de la boussole

9. Bouton de l’illuminateur
de la boussoler

10. Compartiment à pile

11. Caches des objectifs

12. Caches de protection
de l’oculaire

13. Réglage dioptrique

1

7

5

6

12

13

4

2

11

instAllAtion des piles – deux piles type bouton

43

Les piles livrées avec vos jumelles sont destinées à l’éclairage de la boussole afin
de vous permettre de voir facilement dans l’obscurité. Vous devez installer les piles
situées dans la pochette de l’étui. Dévissez le capuchon des piles à la main, puis
retirez la vis avec une pièce ou un tournevis. Les piles doivent être positionnées en
plaçant la polarité positive (+) vers vous. Remettez la vis et le capuchon des piles.
Si vous ne vous servez pas de vos jumelles pendant une longue période (quelques

mois ou plus), retirez les piles pour préserver leur longévité.

t

t

t

utilisAtion du réticule coMMe instruMent de Mesure

Angle De Vision

L’angle de vision d’un objet correspond à l’angle compris
entre les rayons partant des jumelles et ses bords.
Généralement, cet angle est mesuré à l’horizontale ou la
verticale et défini comme l’Angle de vision horizontal et
l’Angle de vision vertical.

Un réticule mildot (illustré à droite) qui possède une
échelle horizontale et verticale peut mesurer l’angle de
vision d’un objet. Les jumelles Celestron utilisent 10 mils
pour chaque chiffre (1,2,3, comme illustré ici).

Mesure De l’Angle De Vision horizontAl

Si l’angle de vision horizontal est inférieur à l’étendue de l’échelle horizontale
(-40~+40 mils) à l’intérieur des jumelles, alignez l’un des
bords de l’objet sur une ligne d’échelle horizontale
(généralement, le centre de la ligne la plus extérieure est
sélectionné en fonction la taille de l’image de l’objet) et
relevez la valeur indiquée. Relevez ensuite la valeur de
l’échelle où se situait un autre bord. Ajoutez ces deux
valeurs pour obtenir l’angle de vision horizontal mesuré.
L’angle de vision horizontal de la cible (voilier) est de 20
mils, et l’angle de vision horizontal entre les cibles est de 40
mils.

Lorsque l’angle de vision horizontal est supérieur à l’étendue de l’échelle
horizontale (-40~+40 mils), utilisez les divisions de la ligne verticale (par exemple
: mât, voile, etc.) sur l’objet peuvent servir à effectuer les estimations de mesure
nécessaires en procédant par étape.

Mesure De l’Angle De Vision VerticAl

La mesure de l’angle de vision vertical est similaire à la
mesure de l’angle de vision horizontal. Lorsque l’angle de
vision vertical mesuré n’occupe qu’une petite partie de
l’échelle, visez le point d’intersection des lignes verticale
et horizontale du réticule sur la partie inférieure de l’objet
et relevez la valeur de l’échelle indiquée en haut de l’objet.
L’angle inclus entre les parties supérieure et inférieure de la
cible (phare) est de 60 mils).

Lorsque l’angle de vision vertical est supérieur à l’étendue de l’échelle verticale (80
mils), il peut être mesuré par étape. L’angle sera alors obtenu en additionnant les
valeurs obtenues à chacune des étapes.

utilisAtion Du réticule pour Mesurer lA DistAnce

La mesure de la distance d’une cible peut se calculer à l’aide du réticule en mils.
La mesure de la distance correspond à la formule suivante : L(km) = H (m)/ω
L — distance entre l’observateur et l’objet (km)
H — hauteur de l’objet (m)
ω — angle de vision de l’objet mesuré à l’aide du réticule des jumelles (mil).