National Geographic 50mm ASTRONOMICAL TELESCOPE Instruction Manual - 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 of a National Geographic telescope.
With proper care and handling of your telescope, you will enjoy looking at
nature’s wondrous sights for many years.
This telescope has been designed to show you the Moon’s craters, Jupiter’s
major moons and even glimpses of Saturn’s rings. It also delivers great views
of mountains, valleys and many other subjects, near and far, in the world
around us.
You can use your telescope as a terrestrial (land) telescope to study birds,
animals and landscapes at a distance. To obtain the best performance from
your new telescope, please read this manual carefully and completely.
THE ALTAZIMUTH MOUNT
This telescope is fitted with an easy-to-aim altazimuth mount. This user-friendly
mounting system allows fast, simple and accurate vertical and horizontal
movement of the telescope.
Assembly
1. Carefully remove all parts from the cardboard boxes and lay them on a
table or on the floor in order to take an inventory of all the pieces. Keep
your box for storage or in case you ever need to ship your telescope.
2. Spread the three legs of the table-top tripod
apart and gently press down on the centre of
the tripod supports until they lock into place.
3. Place the telescope tube over the altazimuth
mount. Lower the telescope tube onto the
mount so that the plastic tongue on the
mount slips into the bracket underneath the
telescope tube (Picture 1).
4. One of the short bracket arms has a
hexagon-shaped cutout around its opening.
Insert the nut from the altitude lock knob
into this cutout. Insert the altitude lock knob
through the bracket and tongue (Picture 2).
Turn the altitude lock knob clockwise into
this nut until it stops.
5. Turn the azimuth lock knob (Picture 3) on
the tripod mount clockwise until it stops.
The telescope is now securelyattached to
the tripod.
6. Loosen the small chrome screw on the side
of the focus tube by turning it anti-clockwise.
Insert the shiny chrome end of the diagonal
mirror into the focus tube so that the
opposite open end is facing upward. Tighten
the small chrome screw on the side of the
focus tube to hold the diagonal mirror
securely in position (Picture 4).
7. Loosen the small chrome screw located on
the side of the diagonal mirror by turning it
anti-clockwise (Picture 5).
8. Insert the low-power eyepiece marked
‘H20mm’ into the diagonal mirror. Tighten
the small chrome set screw by turning it
clockwise to hold the eyepiece securely in
place (Picture 5).
Picture 1
Picture 2
Bracket
Picture 3
Azimuth
lock
knob
Picture 4
Screw
Picture 5
Screw