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Table of Contents

• Telescope parts overview - page 3

• Unboxing and checking for completeness - page 4

• Assembly - page 6

• Collimation - page 8

• Using a Dobsonian telescope - page 11

• Adjusting the red dot finder - page 11

• Observing - page 12

• Hints and tricks - page 14

• Calculating magnification - page 15

• Maintaining the optics - page 16

• Accessories - page 16

• Explore Scientific service - page 17

• Specifications - page 17

All Explore Scientific telescopes and telescope accessories are subject to constant technical improvement. Minor changes 

of product specifications that happen during the improvement of the product are subject to change without notice.

• SUN WARNING: WARNING – NEVER ATTEMPT TO OBSERVE THE SUN WITH THIS DEVICE! OBSERVING THE SUN – EVEN FOR A MOMENT – WILL CAUSE INSTANT AND IRREVERSIBLE DAMAGE TO YOUR 

EYE OR EVEN BLINDNESS. EYE DAMAGE IS OFTEN PAINLESS, SO THERE IS NO WARNING TO THE OBSERVER THAT THE DAMAGE HAS OCCURRED UNTIL IT IS TOO LATE. DO NOT POINT THE DEVICE AT OR NEAR 

THE SUN. DO NOT LOOK THROUGH THE DEVICE AS IT IS MOVING. CHILDREN SHOULD ALWAYS HAVE ADULT SUPERVISION WHILE OBSERVING.

• RESPECT PRIVACY: WHEN USING THIS DEVICE, RESPECT THE PRIVACY OF OTHER PEOPLE. FOR EXAMPLE, DO NOT USE IT TO LOOK INTO PEOPLE’S HOMES. 

 

• CHOKING HAZARD: CHILDREN SHOULD ONLY USE DEVICE UNDER ADULT SUPERVISION. KEEP PACKAGING MATERIALS LIKE PLASTIC BAGS AND RUBBER BANDS OUT OF THE REACH OF CHILDREN AS THESE 

MATERIALS POSE A CHOKING HAZARD. 

• RISK OF BLINDNESS: NEVER USE THIS DEVICE TO LOOK DIRECTLY AT THE SUN OR IN THE DIRECT PROXIMITY OF THE SUN. DOING SO MAY RESULT IN A PERMANENT LOSS OF VISION. 

• RISK OF FIRE: DO NOT PLACE DEVICE, PARTICULARLY THE LENSES, IN DIRECT SUNLIGHT. THE CONCENTRATION OF LIGHT RAYS COULD CAUSE A FIRE. 

• DO NOT DISASSEMBLE THIS DEVICE: IN THE EVENT OF A DEFECT, PLEASE CONTACT EXPLORE SCIENTIFIC CUSTOMER SERVICE DEPARTMENT AT 866.252.3811. 

• DO NOT SUBJECT THE DEVICE TO TEMPERATURES EXCEEDING 60 °C (140 °F).

• DISPOSAL: KEEP PACKAGING MATERIALS, LIKE PLASTIC BAGS AND RUBBER BANDS, AWAY FROM CHILDREN AS THEY POSE A RISK OF SUFFOCATION. DISPOSE OF PACKAGING MATERIALS AS LEGALLY 

REQUIRED. CONSULT THE LOCAL AUTHORITY ON THE MATTER IF NECESSARY AND RECYCLE MATERIALS WHEN POSSIBLE.

• THE WEEE SYMBOL IF PRESENT INDICATES THAT THIS ITEM CONTAINS ELECTRICAL OR ELECTRONIC COMPONENTS WHICH MUST BE COLLECTED AND DISPOSED OF SEPARATELY.

• NEVER DISPOSE OF ELECTRICAL OR ELECTRONIC WASTE IN GENERAL MUNICIPAL WASTE. COLLECT AND DISPOSE OF SUCH WASTE SEPARATELY. 

• MAKE USE OF THE RETURN AND COLLECTION SYSTEMS AVAILABLE TO YOU, OR YOUR LOCAL RECYCLING PROGRAM. CONTACT YOUR LOCAL AUTHORITY OR PLACE OF PURCHASE TO FIND OUT WHAT 

SCHEMES ARE AVAILABLE.

• ELECTRICAL AND ELECTRONIC EQUIPMENT CONTAINS HAZARDOUS SUBSTANCES WHICH, WHEN DISPOSED OF INCORRECTLY, MAY LEAK INTO THE GROUND. THIS CAN CONTRIBUTE TO SOIL AND WATER POLLUTION 

WHICH IS HAZARDOUS TO HUMAN HEALTH, AND ENDANGER WILDLIFE.

• IT IS ESSENTIAL THAT CONSUMERS LOOK TO RE-USE OR RECYCLE ELECTRICAL OR ELECTRONIC WASTE TO AVOID IT GOING TO LANDFILL SITES OR INCINERATION WITHOUT TREATMENT.

 BUTTON/COIN BATTERY WARNING: THIS PRODUCT CONTAINS A BUTTON OR COIN CELL BATTERY. A SWALLOWED BUTTON OR COIN CELL BATTERY CAN CAUSE INTERNAL CHEMICAL BURNS IN AS LITTLE AS TWO 

HOURS AND LEAD TO DEATH. DISPOSE OF USED BATTERIES IMMEDIATELY. KEEP NEW AND USED BATTERIES AWAY FROM CHILDREN. IF YOU THINK BATTERIES MIGHT HAVE BEEN SWALLOWED OR PLACED INSIDE ANY PART 

OF THE BODY, SEEK IMMEDIATE MEDICAL ATTENTION.

• A SWALLOWED BUTTON OR COIN CELL BATTERY CAN CAUSE INTERNAL CHEMICAL BURNS IN AS LITTLE AS TWO HOURS AND LEAD TO DEATH DUE TO CHEMICAL BURNS AND POTENTIAL PERFORATION OF THE 

ESOPHAGUS.

• DISPOSE OF USED BATTERIES IMMEDIATELY, FLAT/DRAINED BATTERIES CAN STILL BE DANGEROUS

• KEEP NEW AND USED BATTERIES AWAY FROM CHILDREN.

• IF YOU THINK BATTERIES MIGHT HAVE BEEN SWALLOWED OR PLACED INSIDE ANY PART OF THE BODY, SEEK IMMEDIATE MEDICAL ATTENTION.

• IF YOU SUSPECT YOUR CHILD HAS SWALLOWED OR INSERTED A BUTTON BATTERY IMMEDIATELY CALL THE POISONS CONTROL HOTLINE AND SEEK IMMEDIATE MEDICAL ATTENTION.

• EXAMINE DEVICES AND MAKE SURE THE BATTERY COMPARTMENT IS CORRECTLY SECURED, E.G. THAT THE SCREW OR ANOTHER MECHANICAL FASTENER IS TIGHTENED. DO NOT USE IF COMPARTMENT IS NOT SECURE.

• TELL OTHERS ABOUT THE RISK ASSOCIATED WITH BUTTON BATTERIES AND HOW TO KEEP THEIR CHILDREN SAFE.

 IMPORTANT SAFETY INSTRUCTIONS

READ AND FOLLOW THE INSTRUCTIONS BEFORE USE. KEEP THESE INSTRUCTIONS FOR LATER USE. 

Summary of Contents for Truss-tube Dobsonian

Page 1: ...MENTS DURING THE DAYTIME NEVER ALLOW ANYONE TO USE THE TELESCOPE OR A FINDER SCOPE DURING THE DAYTIME WITHOUT WARNING THEM OF THE HAZARDS OF AIMING EITHER AT OR NEAR THE SUN MAKE SURE THAT THEY ARE AD...

Page 2: ...ITY ON THE MATTER IF NECESSARY AND RECYCLE MATERIALS WHEN POSSIBLE THE WEEE SYMBOL IF PRESENT INDICATES THAT THIS ITEM CONTAINS ELECTRICAL OR ELECTRONIC COMPONENTS WHICH MUST BE COLLECTED AND DISPOSED...

Page 3: ...er 11 Red dot finder 12 Tension latch Figure 1 Telescope Parts Overview Recommended accessories that are not included Counterweights sold separately contact customer service at 1 866 252 3811 for more...

Page 4: ...ndary mirror cage to the truss pairs 2 long screws with knob to secure the altitude wheels directly to the main mirror box itself 2 long thinner screws with knob to connect the altitude wheels to the...

Page 5: ...ension and the red dot finder This foam insert also protects the main mirror during transit It also gives you the opportunity to store transport eyepieces or accessories Remove the insert and the prot...

Page 6: ...f holes Though the distance of the holes in the altitude wheels appears to be similar the orientation of the wheels on the mirror box DOES matter holes will not align if the altitude wheels are mounte...

Page 7: ...with an attachment point on the bottom of the secondary assembly The telescope is designed to have the focuser oriented on the right side so that the red dot finder is above the focuser when you move...

Page 8: ...mation screws that are located on the back side of the secondary mirror holder 2 Next check the reflection in the secondary mirror of the middle point of the main mirror which is marked by a tiny blac...

Page 9: ...ated on each side of the main mirror Figure 9 1 When you turn the collimation tool you will notice that the hexagonal head of the tool will lock into the hexagonal head of the collimation screw Now yo...

Page 10: ...Try turning the main mirror collimation screws when you are turning the correct screw in the proper direction you will notice that the distracting tail is getting shorter Figure 11 Remember to recente...

Page 11: ...ile the focuser is locked Turning the focuser knobs while the focuser is locked may result in damage to the focuser The telescope comes with two extension tubes 25mm and 20mm tall This is needed so th...

Page 12: ...bits the Sun you can observe the change of the light phases sickle half Venus full Venus very much like the phases of the moon The planetary disc of Venus appears white because the sunlight is reflect...

Page 13: ...light years away Found in the Taurus constellation it consists of more than 1 000 visual stars although an average of only six are visible to the naked eye A dark sky free of light pollution can help...

Page 14: ...exposure to a bright light even if it is a short exposure Use a dim light with a red filter to read star charts or draw objects dim red light does not influence your eye s adaption very much Horizon v...

Page 15: ...atic error correction and flatness of the field of view The maximum usable magnification is about two times the diameter of the aperture in millimeters However in nights of bad to average seeing much...

Page 16: ...ohol 99 Only use soft white unscented lotion free tissues to wipe optics Soak the primary mirror to dissolve the dirt and remove the fluid with short cautious strokes Remember to change tissues every...

Page 17: ...Trusses powder coated aluminum with connectors Secondary spider 4 arm steel Main mirror 10 inch 254 mm parabolic aluminum coated with protective layer 94 reflectivity Focal length 1270 mm Focal ratio...

Page 18: ...18 2019 Explore Scientific LLC 1010 S 48th Street Springdale AR 72762 explorescientificusa com exploreone com 866 252 3811 All rights reserved Made in China Contents and colors may vary...

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