SKY-WATCHER Quantum 120 Refractor, Instruction Manual

6

TELESCOPE MAINTENANCE

While your telescope requires little maintenance, there are a few things 

to remember that will ensure your telescope performs at its best.

CARE AND CLEANING OF THE OPTICS

Occasionally, dust and/or moisture may build up on the objective lens 
of your telescope. Special care should be taken when cleaning any 
instrument so as not to damage the optics.
If dust has built up on the lens, remove it with a brush (made of camel’s 
hair) or with a can of pressurized air. Spray at an angle to the lens 
for approximately two to four seconds. Next, use an optical cleaning 
solution and white tissue paper to remove any remaining debris. Apply 
the solution to the tissue and apply the tissue paper to the lens. Low 
pressure strokes should go from the center of the corrector to the 
outer portion. 

Do NOT rub in circles!

You can use a commercially made lens cleaner or mix your own.  A good 
cleaning solution is isopropyl alcohol mixed with distilled water. The 

solution should be 60% isopropyl alcohol and 40% distilled water. Or, 
liquid dish soap diluted with water (a couple of drops per one quart of 
water) can be used.
Occasionally, you may experience dew build-up on the lens of your 
telescope during an observing session. If you want to continue observing, 
the dew must be removed, either with a hair dryer (on low setting) or by 
pointing the telescope at the ground until the dew has evaporated.  
If moisture condenses on the inside of the lens, remove the accessories 
from the rear cell of the telescope. Place the telescope in a dust-free 
environment and point it down. This will remove the moisture from the 
telescope tube.
To minimize the need to clean your telescope, replace all lens covers 

once you have finished using it. Since the rear cell is NOT sealed, the 

cover should be placed over the opening when not in use. This will 
prevent contaminants from entering the optical tube.

CELESTRON TWO YEAR LIMITED WARRANTY

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. 
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 modified 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 specific 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: 
 

Celestron

Customer Service Department 

2835 Columbia Street 

Torrance, CA 90503 

Tel. (310) 328-9560 

Fax. (310) 212-5835 

Monday-Friday 8AM-4PM PST

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 specific country. Please contact them for any 
warranty service.