CELESTRON 22470 StarSense Explorer Dobsonian 8 Inch Telescope User Guide

: June 4, 2024
: Celestron

Table of Contents

CELESTRON 22470 StarSense Explorer Dobsonian 8-Inch Telescope
What’s in the Box
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

CELESTRON 22470 StarSense Explorer Dobsonian 8-Inch Telescope

What’s in the Box

Box 1 Dobsonian Base

FEET ASSEMBLY AZIMUTH PIVOT BOLT ASSEMBLY HANDLE ASSEMBLY
EYEPIECE RACK ASSEMBLY ALTITUDE BEARING ASSEMBLY
INCLUDED TOOLS
Box 2 – Optical Tube Assembly

NOTE : For collimating your telescope’s optics, refer to the full instruction manual at celestron.com

Connect the side supports (E) to the left side panel (A1) and right side panel (A2) using 6 of the base assembly screws (F). The supports go on the on the same side of the panels as the Celestron logos.
Connect the side panels (A1 & A2) to the front panel (B) using 6 of the base assembly screws (F). Make sure the Celestron logos on the side panels face outward and the small spot mark on the face of the front panel faces inward.
Connect the assembly to the top plate (C) using 10 of the base assembly screws (F). Orient the top plate so the side with the logo faces upward.
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
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.
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.
Install the base handle (J1) onto the front panel (B) using the 2 handle screws (J2).
Install the eyepiece rack (K1) onto the front panel (B) using the 2 rack screws (K2). Note: If you want to remove the rack after it has been installed, simply pull it upwards.
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 end of the bearing with no bevel on it should be flush to the surface of the panel.
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.
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.
Install the altitude tensioning knob (N1) through the slot in the left side panel (A1) and into the threaded insert in the center of the side hub on the optical tube assembly.
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.
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.
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.
Loosen the thumbscrews on the end of the focuser and insert the 2″ extension tube (S) into the focuser. Retighten the thumbscrews.
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.
Loosen the thumbscrews on the 2″-to-1.25″ eyepiece adapter (T) now installed in the focuser, place the 25mm Omni Plössl eyepiece (R1) into the adapter, and retighten the thumbscrews on the adapter.

Your StarSense Explorer Dobsonian is now fully assembled and ready to be used.

Downloading and Activating the App

Before you take your telescope outside, download the StarSense Explorer app to your mobile device. Search for “Celestron StarSense Explorer” in the Apple App Store or Google Play. The app is large, so we recommend downloading it while connected to Wi-Fi.
Once you have downloaded the app, locate the orange postcard in your telescope box. Launch the app. When prompted, enter the activation code on the postcard to activate the app. Your code will unlock up to 5 devices.

Moving the Telescope

The StarSense Dobsonian telescope moves freely in altitude (up-and-down) and azimuth (left-to-right). Simply move the tube by pushing it in the desired direction. You can use the knob handle at the front of the telescope for a hand grip.
If the altitude motion moves too freely, or the telescope moves up or down with no force being applied tighten the altitude tensioning knob. Conversely, if it takes much force to move the telescope upwards or downwards, then loosen the knob.

Aligning the StarPointer

The StarPointer red dot finderscope is one of the most important parts of your telescope. Although the StarSense Explorer app will locate and center objects for you, having the StarPointer properly aligned will help during alignment of the app to the telescope. The first time you assemble your telescope, you need to align the finder to the telescope’s main optics. It’s best to do this during the day.*

CHOOSE A TARGET
Take the telescope outside during the day and find an easily recognizable object, such as a streetlight, car license plate or sign. The object should be as far away as possible, but at least a quarter mile away.
SOLAR WARNING! Never attempt to view the Sun through any telescope without a proper solar filter!
CENTER THE TARGET IN THE EYEPIECE
Look through the telescope using the 25mm eyepiece. Move the telescope until the object you chose lies in the center of the view. If the image is blurry, gently turn the focus knobs until it comes into sharp focus. NOTE: The image in your telescope may appear
inverted. This is perfectly normal in an astronomical telescope.
LOOK THROUGH FINDERSCOPE
Finderscope Pull the battery protection tab out of the StarPointer and turn it on to maximum brightness using the on/ off knob. Look through the StarPointer and locate the red dot.
ADJUST THE FINDERSCOPE
Without moving the telescope, use the two adjustment knobs to move the red dot until it appears over the same object you are observing in the telescope’s 25mm eyepiece.
YOUR FINDERSCOPE IS NOW ALIGNED!
It should not require realignment unless it is bumped or dropped. Now, when you look through the StarPointer, the red dot will indicate where the telescope is pointing.

Attaching the Smartphone

Remove the large cap covering the mirror on the front of the StarSense dock.
Pull open the spring-loaded slider on the top of the phone dock and set the phone into the holder so it is flush with the bottom lip of the phone holder. Slowly release the slider to secure the phone in place.

Your First Night Out
Congratulations: Your telescope is now set up and you are ready to explore the cosmos. Take the telescope outside, insert your 25mm eyepiece, remove the lens cap, insert your smartphone into the holder, and launch the StarSense Explorer app. The tutorial in the app will walk you through the steps to find your first astronomical target.

For more information on this product, please visit the respective product page on celestron.com

SOLAR WARNING: Never attempt to view the Sun through any telescope without a proper solar filter. www.celestron.com/pages/warranty Need assistance? Contact Celestron Technical Support by visiting celestron.com/pages/technical-support