National Geographic RT70400 Instruction Manual Download | Manualshive

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Summary of Contents for RT70400

Page 1: ...ttery Hazardousifswallowed seeinstructions WARNING Thelenscontainsleadthatmaybeharmful Washhandsaftertouching WARNING Thisproductcanexposeyoutochemicalsincludinglead whichisknowntotheStateofCaliforniatocausecancer Formoreinformationgotowww P65Warnings ca gov WARNING RT70400 INSTRUCTION MANUAL 70 MM REFLECTOR TELESCOPE W PANHANDLE MOUNT 1 INCLUDED X1 CR2032 3V ...

Page 2: ...ALS 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 ...

Page 3: ... Optical Tub Assembly OTA 3 Red Dot Viewfinder 4 Focuser 5 Diagonal 6 Focus Wheel 7 Panhandle Alt Azimuth Mount 8 1 25 20 mm 10 mm Kellner Eyepieces 9 Smartphone Adapter 10 Travel Case Available Downloads Visit www esmanuals com What s Included phone not included ...

Page 4: ...viewfinder up and down and the other will move it side to side Your viewfinder is now aligned Note To preserve battery life don t forget to turn off the viewfinder after use Using Your Telescope After you have aligned your viewfinder you are ready to start observing Put the 20 mm eyepiece into the diagonal to get the widest field of view This wider field of view will make it easier to locate and t...

Page 5: ...e use only a photo grade soft brush or a lint free cloth like a microfiber cloth Do not press down too hard while cleaning as this might scratch the lens If necessary the cleaning cloth can be moistened with an optical glass cleaning fluid and the lens wiped clean using very little pressure The eyepiece is NOT waterproof so do not spray fluids directly onto the glass or dip it in water Never use h...

Page 6: ...ce unsupported or unattended on the adapter pad Though the surface of the adapter pad is designed with suction cups and is non skid the manufacturer cannot assure that the pad will support the weight of various devices or guarantee that it will adhere to all surfaces on various smart devices The pad is not intended to secure balance or support the device on its own and the operator should not let ...

Page 7: ...7 Notes ...

Page 8: ...wever with your telescope you can see many of the beautiful details such as the billowing clouds of gas and dust where new stars are being born Image credit NASA ESA M Robberto Space Telescope Science Institute ESA and the Hubble Space Telescope Orion Treasury Project Team Image credit Howard Eskildsen Note Images are for illustration purposes only Quality of your image may very depending upon atm...

Page 9: ... amazing in a telescope the shape of this bright double lobed nebula has been compared to a dumbbell an hourglass or an apple core As an added bonus the white dwarf that lies at the heart of the Dumbbell Nebula is larger than any other star of its kind Andromeda Galaxy M31 Right ascension 00 42 7 hours minutes Declination 41 16 degrees minutes Distance Approximately 2 54 million light years The An...

Page 10: ...objects may appear inverted sideways or at an angle depending on how your tube is oriented due to optical design This rotation is perfectly normal on all Newtonian reflectors and will not affect astronomical viewing Refractor A refracting telescope uses a collection of lenses to gather and focus light A refractor s views will be upside down if a diagonal is not in use A standard diagonal will gene...

Page 11: ...rtical axis mirror image To get an image without this rotation you will need to use a special diagonal with an erect image prism Eyepiece An eyepiece is an optical accessory comprised of several lens elements It determines the magnification of a particular observing setup Primary Mirror The primary mirror is the principle light gathering surface of a reflector telescope Secondary Mirror A secondar...

Page 12: ...ar aperture has a focal ratio of f 10 Focal length Telescope The focal length is the distance in millimeters between the objective lens or primary mirror and the point at which entering light rays converge otherwise known as the focal point The focal lengths of the telescope tube and the eyepiece are used to determine magnification Focal length Eyepiece The focal length is the distance in millimet...

Page 13: ...her in an achromatic doublet design to minimize chromatic aberrations They typically produce an apparent field of view around 45 Plössl Eyepieces A Plossl eyepiece uses two doublets a pairing of lens for a total of four lens elements This eyepiece design delivers sharp views and an apparent field of view of approximately 50 which works well for both planetary and deep sky viewing Barlow Lens A Bar...

Page 14: ...APHIC and Yellow Border Design are trademarks of the National Geographic Society used under license 2021 Explore Scientific LLC 1010 S 48th Street Springdale AR 72762 All rights reserved Made in China explorescientific com 866 252 3811 Contents colors and specifications may vary 14 ...

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