CELESTRON DX 100AZ Refractor Telescope User Guide
- June 3, 2024
- Celestron
Table of Contents
DX 100AZ Refractor Telescope
User Guide
DX 100AZ Refractor Telescope
Unpack your telescope and verify that all parts are present. Your
StarSense Explorer DX includes: a telescope tube, a tripod and mount head, an
accessory bag, slow motion controls, an accessory tray, two eyepieces, an
erect image diagonal, a fi nderscope, a StarSense phone dock, StarSense
Explorer app code card, and a hex key (hidden inside
the slot in the front of the mount head). 
To set up the tripod, spread the legs
outward until they are fully extended and push down the center leg
brace.
Extend the legs of the tripod by loosening the threehand knobs on
each leg. Pull each leg section allthe way out and tighten the hand knobs to
securethem in place.
Place the accessory tray on top of the center
brace and line up the three holes. Insert the three thumb screws through the
top of the leg brace and threadthem into the tray.
To attach the slow-motion
knobs to your mount, first locate the supplied hex key hidden inside the slot
in the front of your mount.
Place the slow-motion control knob over the
D-shaped gear shaft and push inward to make sure it is fully seated. Use the
hex key to tighten the setscrews onto the gear shaft. Return the hex key to
its storage position in the front of the mount.
Turn the clamp assembly so that the
locking screw is on top of the dovetail clamp. Hold the telescope tube next to
the mount with the dovetail bar on the tube facing the clamp on the top of the
mount arm.
Slide the dovetail bar into the clamp at the top
of the mount and tighten the hand knob on the bottom of the clamp to secure
the telescope in place.
Locate the erect image diagonal and remove the
plastic covers. Insert the barrel of the diagonal into the focuser and secure
in place by tightening the setscrews.Insert the barrel of the 25mm eyepiece into the
diagonal and tighten the setscrew.
Slide the fi nderscope bracket into the dovetail
slot on the telescope tube near the focuser. The large window on the fi nder
should be facing the front of the telescope. Secure the bracket by tightening
the setscrew on the dovetail slot.
There is a small clear plastic tab inserted
between the battery and the contact. This was included to prevent the battery
from discharging during shipment. Pull this out to allow your battery to
work.
To install the StarSense phone dock, insert the bayonet mount on
the side of the dock into the port on the side of the mount opposite the
dovetail clamp.
Line up the arrow on the dock with the
alignmentmark on the mount and press inward while turningthe dock
counterclockwise until the orange releasebutton snaps into place in the hole
on the dock.
To remove the dock, press the orange release
button and turn the dock clockwise until the bayonet mount
releases.
Remove the lens cap from the front of the
telescope. To observe, look through the eyepiece as shown above. Focus the
image by turning the knobs below the focuser.
**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 Explorer DX mount has slip clutchesin both axes. To make large movements with thetelescope, simply hold a tripod leg with one handand use the other hand on the telescope tube topush the telescope in the desired direction. To make fi ne adjustments or to track celestial objects, turn both slow motion knobs as required.
**Aligning the Finderscope
**
The fi nder is one of the most important parts of your telescope. It helps you
locate objects and center them in the eyepiece. The fi rst time you assemble
your telescope, you need to align the fi nder to the telescope’s main optics.
It’s best to do this during the day.
SOLAR WARNING! Never attempt to view the Sun through any telescope without a proper solar fi lter! CHOOSE A TARGET
Take the telescope outside during the day and fi nd 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.
CENTER THE TARGET IN THE EYEPIECE
Look through the telescope using your lower powered 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 on either side of the telescope
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
Once the object is centered in your 25mm eyepiece,look through the fi
nderscope and locate the red dot.
ADJUST THE FINDERSCOPE
Without moving the telescope, use the two adjustment knobs to move the fi nder around until the red dot 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.
Attaching the Smartphone
Remove the large cap covering the mirror on
the frontof 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. Most phones fit into the dock with the case on. However, you may
need to remove your phone case if it is especially bulky or unable to fit into
the clamp (i.e. folio style cases).
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 25 mm 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 on finding your first astronomical target.
© 2022 Celestron • All rights reserved celestron.com/pages/technical-
support 2835 Columbia Street •
Torrance, CA 90503 U.S.A.
In association with Royal Observatory Greenwich.
Product design and specifications are subject to change without prior
notification. This product is designed and intended for use by those 14 years
of age and older.
SOLAR WARNING: Never look directly at the Sun with the naked eye or with
a telescope unless you have the proper solar filter. Permanent and
irreversible eye damage may result.
This product contains a button battery. If swallowed, it may cause severe
injury or death in just two hours. Seek medical attention immediately.
WARNING: KEEP BATTERIES OUT OF REACH OF CHILDREN.
Examine the device and make sure the battery compartment is correctly secured,
e.g. that the screw or other mechanical fastener is tightened.
- Do not use if compartment is not secure.
- Dispose of used button batteries immediately and safely. Flat batteries can still be dangerous.
- Tell others about the risk associated with button batteries and how to keep their children safe.
NEED ASSISTANCE?
Contact Celestron Technical Support
celestron.com/pages/technical-support
Printed in China
References
Read User Manual Online (PDF format)
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