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  4. 50mm ASTRONOMICAL TELESCOPE
  5. Instruction Manual

National Geographic 50mm ASTRONOMICAL TELESCOPE Instruction Manual

Summary of 50mm ASTRONOMICAL TELESCOPE

  • Page 1

    Please retain the information in this manual for future reference. Colour, designs and decorations may vary from those shown in the photographs. Item no. Ng 180ml printed in china. National geographic's net proceeds support vital exploration, conservation, research, and education programs. Instructi...

  • Page 2

    1 2 components 20mm low-power eyepiece focus tube diagonal mirror 4mm high-power eyepiece 2 x image erector altitude lock knob focus knob azimuth lock knob telescope tube dew shield objective lens (not in view) altazimuth mount aluminium tripod leg introduction congratulations! You are now the owner...

  • Page 3

    3 4 about magnification the magnification power of a telescope indicates how much an image is enlarged or how big and close it appears to the viewer. The focal length of the eyepiece, combined with the focal length of the telescope, determine the magnification power. To calculate the power of your t...

  • Page 4

    5 6 if you keep the dust caps on your telescope when it is not in use and avoid handling the lenses or mirrors, only minimal optical maintenance of your telescope should be required. Extensive cleaning is usually only necessary every few years. Jupiter has many moons, four of which are often visible...