Using Your Telescope; Cleaning; Possible Objects For Observation; Terrestrial Objects - National Geographic Adventure Set Instruction Manual

Using your telescope:

After you have aligned your viewfinder, you are ready to start observing!
Put the 20mm eyepiece into the diagonal to get the widest field of view. This wider field of view will make it easier to
locate and track objects.
Use the panhandle to move the scope up, down and side to side until your target comes into view in the eyepiece. It
is important to remember that the rotation of the Earth means objects will move out of your eyepiece fairly quickly.
Once you have found and focused on your desired target, you can track it as it journeys across the night sky using the
panhandle.
For a closer look at an object, you can insert the 12.5 mm eyepiece. The magnification will increase from 30x to 48x.
For a more closer look at an object, you can insert the 2x Barlow lens. The magnification will increase to 60x for the
20 mm eyepiece and 96x for the 12.5 mm eyepiece.

Cleaning:

Your telescope is a precision optical device and keeping the optics free of dust and dirt is crucial for optimal
performance. To clean the lenses (objective and eyepiece) 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. Ask your parents to help if
your telescope is really dirty. f necessary, the cleaning cloth can be moistened with an optical glass cleaning fluid and
the lens wiped clean using very little pressure. Do not use harsh detergents!
Make sure your telescope is always protected against dust and dirt.
After use, leave it in a warm room to dry off before storing.

Possible Objects for Observation:

Terrestrial objects

Take note of the examples below, including Mount Rushmore and the
golf course. Start with the 20 mm eyepiece and focus until the image
is clear. After mastering the 20 mm eyepiece, switch to the 12.5 mm
eyepiece and practice scanning and focusing until the image is clear.
Choose several terrestrial objects to practice focusing on, but never
point your telescope at or near the sun, or you risk blindness.
The Moon
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 plains, and some of the
larger craters. The best views will be found along the terminator, which
is the edge where the visible and cloaked portions of the Moon meet.

Troubleshooting Guide:

No picture
Blurred picture
No focus possible
Bad quality
Viewing object visible in the finder, but not
through the telescope
Despite using star diagonal prism the picture is
"crooked"
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Remove dust protection cap and sun-shield from the objective opening.
Adjust focus using focus ring.
Wait for temperature to balance out.
Never observe through a glass surface such as a window.
Align finder to telescope (see instructions)
The star diagonal prism should be vertical in the eyepiece connection.
6
Terrestrial Images
f=20 mm f=12.5 mm
The Moon
f=20 mm f=12.5 mm