FIRSTSCOPE INSTRUCTION MANUAL
FIRSTSCOPE
Model #22025
2 | ENGLISH
SOLAR WARNING
Never look directly at the Sun with the naked eye or with a telescope unless you have the proper solar fi lter. Permanent and irreversible eye damage may result.
Never use your telescope to project an image of the Sun onto any surface. Internal heat build-up can damage the telescope and any accessories attached to it.
Never use an eyepiece solar fi lter or a Herschel wedge. Internal heat build-up inside the telescope can cause these devices to crack or break, allowing unfi ltered sunlight to
pass through to the eye.
Do not leave the telescope unsupervised, especially when children or adults unfamiliar with the correct operating procedures of your telescope are present.
We recommend saving your telescope box so it can be used to store the telescope when it is not in use. Unpack the
box carefully as some parts are small. Use the parts list below to verify that all parts and accessories are present.
PARTS LIST
THE MOUNT & TELESCOPE TUBE
Your FirstScope’s mount and telescope tube are fully assembled. Simply remove the telescope and mount from the box
and set it on a stable surface, such as a table or picnic bench. Be sure to use a support that allows you easy access to
the eyepiece as you move the telescope around the sky.
Your FirstScope’s altazimuth mount was designed to rotate smoothly up, down, left or right with just a gentle push from
your fi ngers, making it easy to track celestial objects as they appear to drift across the night sky.
ASSEMBLING YOUR TELESCOPE
WHAT’S IN THE BOX
20 mm Kellner eyepiece (1.25”)
Dust cover, large
Dust cover, small
10 mm Kellner eyepiece (1.25”)
Fig. 1
Telescope tube and mount (preassembled)
ENGLISH | 3
Fig. 2
The tension in the up and down direction is adjustable to accommodate different weights of eyepieces. Turning the knob
counter-clockwise decreases the tension making it easier to move, while turning the knob clockwise increases tension.
Set the tension at a comfortable level so the telescope will not move downward in response to gravity.
Unlike fi xed targets on the ground, astronomical targets appear to move across the sky. This is caused by Earth’s
rotation. When you look at a celestial target in your telescope, such as the Moon or a planet, it will appear to slowly drift
across the fi eld of view of your eyepiece. In order to keep the object centered in the fi eld of view, you will have to nudge
the mount in altitude and azimuth.
THE EYEPIECES
The FirstScope comes with two eyepieces, one low power (20 mm eyepiece) and one higher power (10 mm eyepiece).
Whenever you set up your telescope, always start with the 20 mm eyepiece. Once you have your target centered in the
20 mm eyepiece, you can switch to your higher power 10 mm eyepiece to get a more detailed view.
Note that because your telescope is designed for astronomical use, images of terrestrial objects will appear
upside-down. This is perfectly normal.
To install an eyepiece:
1. Loosen the two silver setscrews on the focuser and pull out the small
plastic dust cap.
2. Insert the silver barrel on the bottom of the eyepiece into the focuser.
3. Tighten the two setscrews to secure the eyepiece.
4. To see the sharpest image possible, you need to focus the eyepiece.
To focus, look through the eyepiece and slowly turn the focusing
YOUR FIRST ASTRONOMICAL OBSERVING SESSION
THE MOON
Now you are ready to take your telescope out at night and do some real observing!
Let’s start with the Moon. The Moon takes about one month go through a complete phase cycle, from New Moon to Full
Moon and back again. Try observing it at different points during this cycle.
While you can observe the Moon any time it is visible in the night sky, the best time to view it is from two days after a New
Moon up to a few days before a Full Moon. During this period, you will be able to see the most detail in craters and lunar
mountain ranges. Consult a calendar to fi nd out when the next New Moon will be.
1. With a clear view of the Moon, set up your telescope with the 20 mm eyepiece.
2. Roughly point the telescope toward the moon by sighting down the length of the tube.
3. Look through the 20 mm eyepiece. Gently turn the focus knobs to adjust the sharpness of the image.
CONGRATULATIONS! YOU HAVE NOW OBSERVED YOUR FIRST CELESTIAL OBJECT!
To get a closer view of the Moon, replace the 20 mm eyepiece with the 10 mm eyepiece. It will give you more magnifi cation,
making the Moon appear much larger. You may need to adjust the focus knobs when you change eyepieces to ensure you
are getting the sharpest image.
You can view many other celestial objects, such as planets, star clusters and nebulae using this same basic technique.
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CELESTRON TWO YEAR LIMITED WARRANTY
A. Celestron warrants your telescope to be free from defects in materials and workmanship for two years. Celestron will repair or replace
such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. As a condition to
the obligation of Celestron to repair or replace such product, the product must be returned to Celestron together with proof-of-purchase
satisfactory to Celestron.
B. The Proper Return Authorization Number must be obtained from Celestron in advance of return. Call Celestron at (310) 328-9560 to
receive the number to be displayed on the outside of your shipping container.
All returns must be accompanied by a written statement setting forth the name, address, and daytime telephone number of the owner,
together with a brief description of any claimed defects. Parts or product for which replacement is made shall become the property of
Celestron.
The customer shall be responsible for all costs of transportation and insurance, both to and from the factory of Celestron, and shall be
required to prepay such costs.
Celestron shall use reasonable efforts to repair or replace any telescope covered by this warranty within thirty days of receipt. In the event
repair or replacement shall require more than thirty days, Celestron shall notify the customer accordingly. Celestron reserves the right to
replace any product which has been discontinued from its product line with a new product of comparable value and function.
This warranty shall be void and of no force of effect in the event a covered product has been modifi ed in design or function, or subjected to
abuse, misuse, mishandling or unauthorized repair. Further, product malfunction or deterioration due to normal wear is not covered by this
warranty.
CELESTRON DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WHETHER OF MERCHANTABILITY OF FITNESS FOR A PARTICULAR USE, EXCEPT
AS EXPRESSLY SET FORTH HEREIN. THE SOLE OBLIGATION OF CELESTRON UNDER THIS LIMITED WARRANTY SHALL BE TO REPAIR OR REPLACE
THE COVERED PRODUCT, IN ACCORDANCE WITH THE TERMS SET FORTH HEREIN. CELESTRON EXPRESSLY DISCLAIMS ANY LOST PROFITS, GENERAL,
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES WHICH MAY RESULT FROM BREACH OF ANY WARRANTY, OR ARISING OUT OF THE USE OR
INABILITY TO USE ANY CELESTRON PRODUCT. ANY WARRANTIES WHICH ARE IMPLIED AND WHICH CANNOT BE DISCLAIMED SHALL BE LIMITED IN
DURATION TO A TERM OF TWO YEARS FROM THE DATE OF ORIGINAL RETAIL PURCHASE.
Some states do not allow the exclusion or limitation of incidental or consequential damages or limitation on how long an
implied warranty lasts, so the above limitations and exclusions may not apply to you.
This warranty gives you specifi c legal rights, and you may also have other rights which vary from state to state.
Celestron reserves the right to modify or discontinue, without prior notice to you, any model or style telescope.
If warranty problems arise, or if you need assistance in using your telescope contact:
© 2014 Celestron • All rights reserved
celestron.com
2835 Columbia Street • Torrance, CA
90503 U.S.A.
Telephone: 800.421.9649
Printed in China
08-14
For more tips for astronomical observing please visit
ExploreTheSky.com
There you will fi nd comprehensive tips to help you get the most from your new telescope including:
• How to observe the planets
• How to locate and observe stars, double stars, star clusters
• How to observe deep-sky objects such as nebulae and galaxies
• How to choose a good location for astronomical observing
• How to evaluate sky conditions
NOTE: This warranty is valid to U.S.A. and Canadian customers who have purchased this
product from an authorized Celestron dealer in the U.S.A. or Canada. Warranty outside
the U.S.A. and Canada is valid only to customers who purchased from a Celestron’s
International Distributor or Authorized Celestron Dealer in the specifi c country. Please
contact them for any warranty service.
