Celestron StarSense Explorer DOBSONIAN Bedienungsanleitung

#22470 STARSENSE EXPLORER 8” DOBSONIAN #22471 STARSENSE EXPLORER 10” DOBSONIAN

INSTRUCTION MANUAL

2I ENGLISH

INTRODUCTION

Congratulations on your purchase of the StarSense Explorer Dobsonian (SSE Dob) telescope. Your SSE Dob combines large

optics with the exciting StarSense Explorer dock and app to make ﬁnding and observing all kinds of astronomical objects fun

and easy! You’ll be able to locate faint deep-sky objects—galaxies, nebulae, star clusters and more— and place them within the

ﬁeld of view of the eyepiece in seconds. The large primary mirror collects lots of light, enabling you to see details in objects that

you have never seen before.

Before you take your StarSense Explorer Dob outside for your ﬁrst night of observing, we recommend reading through this

manual. It will help you to better understand the features of your telescope and know what to expect.

ENGLISH I 3

TABLE OF CONTENTS

What’s in the Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Base Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Telescope Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Pointing the Telescope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Focusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Using the StarPointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

StarSense Explorer Dock and App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Determining Magniﬁcation and Selecting Eyepieces . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Cooling your Telescope’s Optics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Your First Night Out - What to Expect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Dark Adaptation and Light Pollution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Use of Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Collimating the Optics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Transporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Care and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Speciﬁcations StarSense Explorer 8” Dobsonian . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Speciﬁcations StarSense Explorer 10” Dobsonian. . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Solar Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4I ENGLISH

K1 K2 L1 L2

J1 J2

H1 H2 H3 H4 H5

G1 G2 G3

A2 B C D

WHAT’S IN THE BOX

Box 1 - Dobsonian Base

Box 2 - Optical Tube Assembly

Left side panel

Feet (x3)

AZIMUTH PIVOT BOLT ASSEMBLYFEET ASSEMBLY

HANDLE ASSEMBLY EYEPIECE RACK ASSEMBLY

INCLUDED TOOLS

ALTITUDE BEARING ASSEMBLY

Base

handle

Eyepiece rack

Rubber

bumper

Optical tube assembly with dust cover

25mm Omni

Plössl eyepiece

2”-to1.25” eyepiece

adapter with 1.25”

cover cap

2” focuser

extension tube

Collimation cap with

2mm and 2.5mm hex keys*

*2.5mm hex key included with 8” Dob only

NOTE: For collimating your telescope’s

optics, refer to page 14

Altitude

tensioning knob

Cosmetic knob

Screwdriver

StarSense dock StarPointer

red dot ﬁnderscope

Crescent

wrenches (x2)

Hex keys (x2)

Rack

Screws (x2)

Altitude bearing

cylinders (x4)

Bearing

screws (x4)

Handle

screws (x2)

Feet screw

covers (x3)

Feet screws

(x3)

Bolt Nut Steel

washers

(x2)

Hollow

plastic

cylinder

Teﬂon

washer

Right side panel Front panel Top plate Bottom plate

Side supports

(x2)

Base assembly

screws (x22)

ENGLISH I 5

BASE ASSEMBLY

Figure 1A: Exploded view of the StarSense

Explorer Dobsonian base.

6I ENGLISH

Figure 1B: Exploded view of the StarSense Explorer Optical Tube Assembly

Refer to Figure 1 to see how the parts of the SSE Dob ﬁt together.

For detailed assembly instructions, refer to the printed Quick Setup Guide included in the box, or on the SSE Dob product page

at www.celestron.com

TELESCOPE ASSEMBLY

ENGLISH I 7

POINTING THE TELESCOPE

Dobsonian bases are altazimuth mounts. This means that

the telescope moves in two directions: up-and-down

(i.e. altitude), and left-to-right (i.e. azimuth) (Figure 2).

ALTITUDE

AZIMUTH

Figure 2: The StarSense Explorer Dobsonians have two axes of motion:

altitude (up-and-down) and azimuth (left-to-right).

Pointing your Dob at an object is easy. Simply move the

telescope tube up-and-down and left-to-right until the

telescope is pointed toward the desired object and the

object appears in the telescope’s eyepiece. The panning

knob at the front of the telescope tube provides a convenient

place to grasp the tube for pointing (Figure 3). Using this

knob also prevents heat from your hand from entering the

optical path, which can temporarily distort the view.

Figure 3: The panning knob provides an excellent place for your ﬁngers to

grasp when pointing the telescope.

You can adjust the tension along the altitude axis by turning

the knob located on the same side as the telescope’s

focuser—the altitude tensioning knob (Figure 4).

Figure 4: The tension of the altitude motion can be adjusted with the

altitude tensioning knob. (NOTE: the other knob on the opposite side does

not function for adjusting altitude tension.)

Turn the knob to add enough tension to provide a smooth

up-and-down motion. Under most circumstances you won’t

need to add much tension. The telescope is balanced for

normal use. However, if you are using a heavy eyepiece or

a larger smartphone, you may need to add more tension so

that the telescope remains still when not touched.

8I ENGLISH

FOCUSING

The SSE Dobs come with a 2” Crayford focuser, a 2”

extension tube, and a 2”-to-1.25” eyepiece adapter.

With these three items, you can use virtually any telescope

eyepiece with the SSE Dob.

For most eyepieces, make sure the 2” extension tube

is in place in the focuser. If it’s not, the eyepiece will not

reach focus. If you’re using an eyepiece that requires a lot of

inward focus travel, remove the 2” extension tube. You may

need to remove the tube if attempting to use your Dob with

an astronomical imaging camera.

If you wish to use a 1.25” format eyepiece, you’ll need to

use the 2”-to-1.25” eyepiece adapter. Simply place it in the

focuser (with 2” extension tube attached), and then place

the 1.25” eyepiece in the adapter. Tighten the thumbscrew

on the adapter to secure the eyepiece in place. The adapter

uses an internal brass compression ring so your eyepiece

barrel won’t be scratched or marred.

To focus, turn the focus knobs clockwise or counterclockwise

until the object in the telescope eyepiece is in sharp focus.

To lock the focuser position in place once you have achieved

sharp focus, tighten the focus lock thumbscrew (Figure

5). If you need to adjust the focus knob’s tension, you can

tighten or loosen the focuser tensioning set screw using the

provided hex key.

FOCUS LOCK

THUMBSCREW

FOCUSER

TENSIONING

SET SCREW

Figure 5: The focus lock thumbscrew locks the focuser in place once

focus has been achieved. The focus tensioning set screw adjusts the

tension of the focusing knobs.

Since the SSE Dob is a Newtonian reﬂector, the images

you’ll see will appear upside-down as compared to the

naked eye (Figure 6). While this has little impact on

astronomical observing, it can be a bit confusing when you

are viewing land-based objects.

Figure 6: Like all Newtonian reﬂectors, the SSE Dobs produce images

that appear upside-down as compared to the naked eye.

VIEW THROUGH NEWTONIAN REFLECTOR TELESCOPE

NAKED EYE VIEW

ENGLISH I 9

USING THE STARPOINTER

Although you won’t need to rely on the StarPointer red-dot

ﬁnder when you are using the StarSense Explorer app, it can

help you align the app with the telescope. The StarPointer

also comes in handy when you are locating objects during

the day, since the app only works under the stars at night.

To align the StarPointer, ﬁrst point the telescope at an

object that is at least ¼ mile away. We recommend aligning

during the day. Choose a distant tree, sign, building, or

other landmark. If you are aligning at night, you can use a

streetlight, the Moon, or a bright star or planet.

Once you have pointed the telescope at the object, check

to ensure that it appears in the eyepiece. Next, turn the

StarPointer on using the LED dial (Figure 7).

LED DIAL

ALTITUDE KNOB AZIMUTH KNOB

Figure 7: The StarPointer red-dot ﬁnderscope.

Turn up the brightness level until you can easily see the

red dot. Now, without moving the telescope, use the

StarPointer’s altitude and azimuth adjustment knobs to

center the red dot on the same object that you centered

in the telescope eyepiece. When you’re ﬁnished, check

to make sure the object is still centered in the telescope

eyepiece. If it is, you are done aligning the StarPointer. If

not, move the telescope so the object in the telescope’s

eyepiece is centered again. Continue using StarPointer’s

altitude and azimuth adjustment knobs to center the red dot

on the object again.

Turn off the StarPointer when you aren’t using it to conserve

its battery. While the StarPonter’s battery should last a long

time, eventually it will need to be replaced with a CR2032

3V Lithium button cell battery. These are very common and

available from a wide variety of retailers.

To replace the battery:

1. Use a Phillips-head screwdriver to remove the battery

cover securing screw (Figure 8).

Figure 8: To open the StarPointer’s battery cover, ﬁrst remove the

securing screw.

2. Remove the discharged battery from the battery com-

partment. You may need to use a knife or screwdriver to

pry the battery out of its holder.

3. Insert the new battery so that the positive side is visible to

you. Make sure the battery is properly seated within the

battery compartment (Figure 9).

Figure 9: When the battery is properly seated in the compartment as

shown, the battery cover should be easy to reinstall.

4. Close the battery compartment and reinstall the securing

screw.

10 I ENGLISH

STARSENSE EXPLORER DOCK

AND APP

Perhaps the most exciting feature of the StarSense

Explorer Dobsonian is the StarSense Explorer dock and the

StarSense Explorer smartphone app. With the app to guide

you, you’ll spend more time observing objects instead of

struggling to ﬁnd them among myriad stars overhead! The

Celestron StarSense Explorer is the only Dobsonian that

includes this incredible feature.

To begin, download and install the app from the Apple

App Store (iOS) or Google Play (Android). You’ll also ﬁnd

the minimum system requirements there. If you have any

questions about whether your smartphone is compatible

with the app, please visit celestron.com/SSE

Once you have downloaded the app, use the app unlock

code that you’ll ﬁnd on the printed card that came with your

telescope (Figure 10).

Download the app from the

before your first observing session

When prompted, enter the unique unlock code below to

enable telescope control on your device.

Figure 10: The StarSense Explorer App unlock code is printed on the card

included with your telescope.

Each code can enable up to ﬁve devices to use the

StarSense Explorer functionality. If you use the code all ﬁve

times and need to unlock the app on more devices, please

contact Celestron Technical Support at celestron.com/

pages/technical-support for options.

With the app unlocked, you are ready to begin. Place your

smartphone into the StarSense Explorer dock and press

the StarSense icon at the bottom of the planetarium screen

(Figure 11).

Choose the “NEEDS ALIGNMENT” option and follow the

on-screen prompts to align the smartphone’s camera with

the telescope. Once this procedure is complete, you can

use the app to locate objects.

Select an object to view from the planetarium or the

“Tonight’s Best” list (i.e. press the star icon). Arrows will

appear on screen, guiding you to the object. Follow the

arrows until the bullseye turns green and the object is in

your telescope’s ﬁeld of view. It’s that easy!

While you observe, you can read detailed information about

the object. Hundreds of the most popular objects also offer

an audio presentation. To listen, press the bar at the bottom

of the screen that contains the object’s name (Figure 12).

STARSENSE ICON

Figure 11: Once you have unlocked the StarSense Explorer app, press the

StarSense icon to begin ﬁnding objects.

Figure 12: Press the Object Info bar to receive additional information about

the selected object, including images and audio presentations for many

objects.

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