Celestron StarSense Explorer DOB Manuel utilisateur

Quick Setup Guide

#22472 STARSENSE EXPLORER 12” DOBSONIAN

ENGLISH

2 | ENGLISH

What’s in the Box

K1 K2

L1 L2

J1 J2

H1 H2 H3 H4 H5

G1 G2 G3

A2 B C D

Left side panel

Feet (x3)

Base

handle

Altitude bearing

cylinders (x4)

Rubber bumper

Screwdriver

INCLUDED TOOLS

ALTITUDE BEARING ASSEMBLY

HANDLE ASSEMBLY

FEET ASSEMBLY

Box 1 - Dobsonian Base

AZIMUTH PIVOT BOLT ASSEMBLY

EYEPIECE RACK ASSEMBLY

Crescent

wrenches (x2)

Hey keys (x2)

Bearing

screws (x4)

Eyepiece rack Rack

screws (x2)

Bolt Nut Steel

washers

(x2)

Hollow

plastic

cylinder

Teﬂon

washer

Feet

screws (x3)

Handle

screws (x2)

Feet screws

covers (x3)

Right side panel Front panel Top Plate Bottom Plate Base assembly

screws (x27)

Side supports

(x2)

ENGLISH | 3

V W

Box 2 - Optical Tube Assembly

Box 3 - Primary Mirror

Optical tube assembly with dust cover

Altitude

tensioning knob

32mm Omni

Plössl eyepiece

2” focuser

extension tube

2”-to-1.25” eyepiece

adapter with 1.25”

cover cap Collimation cap with

2mm hex key

Cosmetic knob

Primary mirror in mirror cell

BACKFRONT

Mirror cell screws (x6)

StarSense dock StarPointerTM

red dot ﬁnderscope

4 | ENGLISH

1. Connect the side supports (E) to the left side panel (A1) and

right side panel (A2) using 8 of the base assembly screws (F).

The supports go on the on the same side of the panels as the

Celestron logos.

4. Connect the assembly to the top plate (C) using 11 of the base

assembly screws (F). Orient the top plate so the side with the

logo faces upward.

3. Connect the side panels (A1 & A2) to the front panel (B) using

8 of the base assembly screws (F). Make sure the Celestron

logos on the side panels face outward and the rubber bumper

on the front panel faces inward.

2. Attach the rubber bumper (M) to the interior surface of the front

panel (B). There is a small spot on the front panel that indicates

where to place the rubber bumper. Remove the adhesive backing

from the bumper and press the bumper ﬁrmly onto the spot.

SPOT MARK

Assembly

ENGLISH | 5

6. Connect the assembly to the bottom plate (D). Place one of the

steel washers (H3) and the plastic cylinder (H4) onto the bolt

(H1). Then, insert the bolt through the central hole in the bottom

plate. Next, place the Teﬂon washer (H5) over the plastic

cylinder (H4) now protruding from the bottom plate. Take the

assembled base and lower it onto the bottom plate so that the

plastic cylinder goes through the central hole in the top plate.

Now, place the remaining steel washer (H3) on the end of the

bolt protruding from the top plate. Thread the nut (H2) onto the

bolt. Go to Step 7 for instructions to tighten the bolt.

8. Install the base handle (J1) onto the outside of the front panel

(B) using the 2 handle screws (J2).

7. Use the two crescent wrenches to tighten the nut onto the

bolt. Hold the head of the bolt stationary with one crescent

wrench while using the other crescent wrench to tighten the nut.

DO NOT OVERTIGHTEN THE NUT! With some force, you

should still be able to move the steel washer underneath the

nut with your ﬁngers. If the washer cannot be moved with your

ﬁngers, slightly loosen the nut.

5. Attach the 3 feet (G1) to the bottom plate (D) using the 3 feet

screws (G2). Thread the screws ﬁrmly into the predrilled pilot

holes. Once installed, press the feet screw covers (G3) onto the

ends of the feet.

5H2

NUT

STEEL WASHER

TEFLON WASHER

PLASTIC CYLINDER

STEEL WASHER

BO LT

6 | ENGLISH

9. Install the 2 rack screws (K2) onto the front panel, then install

the eyepiece rack (K1) by inserting the head of the rack screw

through the keyhole in the eyepiece rack, then push the rack

downwards.

NOTE: If you want to remove the rack after it has been installed,

simply pull it upward.

10. Install the altitude bearing cylinders (L1) onto the left and right

side panels (A1 & A2) with the altitude bearing screws (L2).

The bearings go on the interior surfaces of the side panels. The

ﬂat end of the bearing—with no bevel on it—should be ﬂush to

the surface of the panel.

11. Install the primary mirror cell (V) into the optical tube assembly

(O). First remove the plastic wrap and tissue paper that protect

the primary mirror during shipment.

12. Stand the optical tube assembly (O) up vertically so the front

end is on the ground and the exposed edge of the bottom of

the tube faces upward.

K21

11 12

BEVEL

FLAT

ENGLISH | 7

16. Install the altitude tensioning knob (N1) through the slot in the

left side panel (A1) and int o the threaded insert in the center

of the side hub on the optical tube assembly. The tensioining

knob (N1) is the one with the stepped bushing on its shaft.

N1 A1

15. Place the optical tube assembly (O) onto the assembled

Dobsonian base. The side hubs on the tube should sit on the

altitude bearing cylinders on the base.

13. Turn the primary mirror cell upside-down (V) (i.e., so the primary

mirror faces downward), align the threaded holes in the mirror

cell’s perimeter with the through holes in the end of the tube,

and place the mirror cell onto the tube.

14. Next, install the mirror cell screws (W) through the tube and

into the cell. Do not ﬁrmly tighten the screws yet because you

may need to make slight adjustments to the cell’s position to

precisely align the holes. Once all the screws are threaded into

the mirror cell, ﬁrmly tighten them in place.

13 14

8 | ENGLISH

17. Install the cosmetic knob (N2) through the slot in the right side

panel (A2) and into the threaded insert in the center of the side

hub on the optical tube assembly. The cosmetic knob (N2) is

the one with the straight bushing on its shaft.

18. Install the StarSense dock (P). First, loosen the 2 thumbscrews

on the StarSense base on the tube. Insert the dock into the

base, and then retighten the thumbscrews.

1817

19. Install the StarPointer red dot ﬁnderscope (Q) onto the

optical tube assembly. First, loosen the thumbscrew on the

ﬁnderscope holder. Insert the base of the StarPointer into the

holder and tighten the thumbscrew.

20. Loosen the thumbscrews on the end of the focuser and

insert the 2” extension tube (S) into the focuser. Retighten

the thumbscrews.

2019

THUMB SCREWS

ENGLISH | 9

21. Loosen the thumbscrews on the 2” extension tube (S)

now installed in the focuser and insert the 2”-to-1.25”

eyepiece adapter (T). Retighten the thumbscrews on the

2” extension tube. The 2”-to-1.25” eyepiece adapter may

already be installed in the 2” extension tube.

22. Loosen the thumbscrews on the 2”-to-1.25” eyepiece

adapter (T) now installed in the focuser, place the 32mm

Omni Plössl eyepiece (R1) into the adapter, and retighten

the thumbscrews on the adapter.

2221

CORRECT

Collimating the Optics

Collimation is the process of aligning the telescope’s optics. Since the primary mirror does not come installed in the optical tube, we recommend

collimating the optics before your ﬁrst night out. It is easiest to collimate a telescope during the day with the telescope pointed toward a blank

wall. This will provide a high-contrast view, making it easier to determine which adjustments to make. Use the supplied hex key(s) to make

adjustments.

1. To check alignment of the mirrors, ﬁrst remove any eyepieces.

Make sure the 2”-to-1.25” adapter is installed in the focuser.

Then, place the collimation cap (U) in the focuser.

2. Look through the small hole in the center of the collimation cap. If your

view matches the ﬁrst image, your optics are collimated properly and

you are ﬁnished. If your view resembles the second image, you’ll need

to adjust the mirrors’ alignment. Continue to step 3.

1 2

INCORRECT

10 | ENGLISH

Edge of

secondary

mirror

Reﬂection of

primary mirror

3. While making adjustments, position the tube horizontally. This

prevents anything from falling onto the primary mirror.

5. First, adjust the secondary mirror at the front of the telescope

using the 2mm hex key. Use the three socket-head setscrews

in the secondary mirror holder to adjust the tilt of the secondary

mirror.

a. Adjust one setscrew at a time. Make only small adjustments.

b. If one setscrew becomes too tight or too loose, make

adjustments to the other setscrews to compensate.

When you are ﬁnished, make sure all three of the setscrews

are snug.

4. You should be able to see the reﬂection of the entire primary

mirror centered within the secondary mirror as shown in Step

2. If you can’t, as shown above, the secondary mirror will need

adjustment.

SECONDARY

MIRROR

PRIMARY

MIRROR

2mm Hex Key

7. You won’t need any tools to tilt the primary mirror. Instead,

simply adjust the thumbscrews. The three smaller thumbscrews

are locking thumbscrews, while the larger three collimation

thumbscrews adjust the tilt. Start by loosening all three of the

locking thumbscrews.

Edge of

secondary

mirror

Reﬂection of

primary mirror

Reﬂection of

secondary mirror

6. Look through the collimation cap again to verify that the primary

mirror is centered in the secondary mirror as shown above. If

it is, the secondary mirror is collimated. Next, adjust the tilt of

the primary mirror until the reﬂection of the secondary mirror is

centered within the reﬂection of the primary mirror.

8. Adjust the collimation thumbscrews one at a time. Each

collimation thumbscrew is spring-loaded, so you can rotate it

clockwise or counterclockwise.

COLLIMATION

THUMBSCREW

LOCKING

THUMBSCREW

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