National Geographic NG50MM Instruction Manual Download

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Parts Overview

1. Focus Wheel
2. Diagonal Mirror
3. Eyepieces (12.5 mm, 20 mm)
4. Telescope Tube
5. Dew Shield
6. Objective Lens
7. Locating Screw For The Vertical Adjustment
8. Locating Screw For The Vertical Axis
9. Tripod Legs

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Summary of Contents for NG50MM

Page 1: ...ars WARNING Thelenscontainsleadthatmaybeharmful Washhandsaftertouching WARNING Thisproductcanexposeyoutochemicalsincludinglead whichisknowntotheStateofCaliforniatocausecancer Formoreinformationgotowww P65Warnings ca gov WARNING 80 10051 EN 6 NG50MM INSTRUCTION MANUAL 50 MM TABLE TOP TELESCOPE WITH AZ MOUNT ...

Page 2: ...ICE DEPARTMENT AND CAN SEND THE DEVICE IN TO BE REPAIRED IF NECESSARY 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 A 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 ...

Page 3: ...Mirror 3 Eyepieces 12 5 mm 20 mm 4 Telescope Tube 5 Dew Shield 6 Objective Lens 7 Locating Screw For The Vertical Adjustment 8 Locating Screw For The Vertical Axis 9 Tripod Legs 1 2 2 3 3 4 5 7 9 8 6 Available Downloads Visit www esmanuals com ...

Page 4: ...divide the focal length of the telescope tube by the focal length of the eyepiece How To Set Up Note We recommend assembling your telescope for the first time in the daylight or in a lit room so that you can familiarize yourself with assembly steps and all components Please look for a suitable location for your telescope before you begin Use a stable surface e g a table Mount the telescope to the ...

Page 5: ...n Diameter 3 476 km Distance Approximately 384 401 km The Moon is the Earth s only natural satellite and it is the second brightest object in the sky after the Sun Although it is our closest neighbor a lot of people have never really taken a good long like at the Moon With your telescope you should be able to see several interesting lunar features These include lunar maria which appear as vast pla...

Page 6: ... sits at a 45 angle in relation to the eyepiece Light bounces off of this secondary mirror and out through the eyepiece A reflector telescope is designed for astronomical use Terrestrial 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 viewi...

Page 7: ...tical 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 secondary...

Page 8: ...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 9: ...s elements two of which are paired together 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 planetar...

Page 10: ...10 Notes ...

Page 11: ...11 Notes ...

Page 12: ...APHIC and Yellow Border Design are trademarks of the National Geographic Society used under license 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 12 ...

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