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National Geographic NG 91 Instruction Manual

National Geographic NG 91 Instruction Manual

50mm astronomical telescope

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WARNING!
Do not view the sun through
the telescope as serious injury
to the eye may occur.
National Geographic's net proceeds
support vital exploration, conservation,
research, and education programs.
Parents: Experience the National Geographic Channel.
Call your cable or satellite provider.
Visit our website: www.ngceurope.com
Visit our website: kids.nationalgeographic.com
© 2012 National Geographic Society.
NATIONAL GEOGRAPHIC and Yellow Border Design
are trademarks of National Geographic Society.
All rights reserved.
Item no. NG 91
Telescopes should
always be used under
adult supervision.
www. trendsuk.co.uk
Distributed by Trends UK Ltd,
Harwell Innovation Centre,
Curie Avenue, Harwell Oxford,
Didcot, OX11 0QG, UK
Email: trends@jgdirect.net
Customer Services:
+44 (0) 844 800 1049
Printed in China
Please retain the information in
this manual for future reference.
Colour, designs and decorations may vary
from those shown in the photographs.
AGES 8 AND UP

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Summary of Contents for National Geographic NG 91

  • Page 1 Distributed by Trends UK Ltd, research, and education programs. Harwell Innovation Centre, Curie Avenue, Harwell Oxford, Parents: Experience the National Geographic Channel. Didcot, OX11 0QG, UK Call your cable or satellite provider. Email: trends@jgdirect.net Visit our website: www.ngceurope.com Customer Services: Visit our website: kids.nationalgeographic.com...
  • Page 2 PARTS OF YOUR TELESCOPE If you only see black or grey when looking through the telescope, it could be you are using an eyepiece with too high a magnification, so swap to the lower-power eyepiece and check again. Using the 16.6mm Telescope tube higher-powered eyepiece will make objects seem darker.
  • Page 3: About Magnification

    USING THE IMAGE ERECTOR 4. Fit the eyepieces like this: For viewing terrestrial (land-based objects), remove the diagonal The 16.6 and 8.3mm mirror from the focus eyepieces fit like this. tube by unscrewing the thumbscrew and pulling out as shown. Fit the image erector to the end of the focus tube and secure with the thumbscrew.
  • Page 4: Using Your Telescope

    USING YOUR TELESCOPE TAKING CARE OF YOUR TELESCOPE The lens and eyepieces in your telescope can get dirty over time, and 1. The best way to use your telescope is outside, because viewing utmost care must be taken when cleaning them. Here are some tips for through windows (even if they are open) can be distorted by keeping your telescope in good working order: reflections from the glass or by air currents (differing...