Using Your Telescope; Cleaning; Replacing Coin Battery; Troubleshooting Guide - National Geographic STAR APP70 Instruction Manual

Using Your Telescope:

After you have aligned your viewfinder, you are ready to start observing! Put the 26mm eyepiece into
the focuser 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.
To get a closer look at an object, take out the 26mm eyepiece and replace it with the 9.7mm eyepiece.
This will increase the magnification to 72x. For the strongest magnification, take out the 9.7mm eyepiece
and insert the 2x Barlow lens into the focuser. Put the 9.7mm eyepiece into the Barlow lens and secure
it in place, this will up the magnification from 72x to 144x. If you use the Barlow lens with the 26 mm
eyepiece, the magnification will change from 26.9x to 52x.
Note: Terrestrial objects will appear
reversed due to the optical setup. This
rotation is perfectly normal for a refractor
using a standard diagonal, and it will not
affect astronomical viewing.

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. If necessary, the cleaning cloth can be moistened with an optical glass cleaning fluid
and the lens wiped clean using very little pressure. The eyepiece is NOT waterproof so do not spray
fluids directly onto the glass or dip it in water. Never use harsh detergents! After you have finished
cleaning an eyepiece, allow it to fully dry before storing.
Make sure your telescope is always protected against dust and dirt. After use, leave it in a warm room
to dry off before storing.

Replacing Coin Battery:

Troubleshooting Guide:

Problem
No picture
Blurred picture
No focus possible
Bad quality
Focal Length Eyepiece
700mm 26mm
700mm 9.7mm
Battery (+)
Push aside and
remove the battery.
Solution
Remove dust protection cap.
Adjust focus using focus wheel.
Wait for temperature to balance out.
Never observe through a glass surface such as a window.
5
Magnification 2x Barlow Lens
26.9x 52x
72x 144x