Terms; Troubleshooting - Edu Science T360 User Manual

Telescope ABC's
What do the following terms mean?
Diagonal:
A mirror that defl ects the ray of light 90 degrees. With
a horizontal telescope tube, this device defl ects the
light upwards so that you can comfortably observe by
looking downwards into the eyepiece. The image in a
diagonal mirror appears upright, but rotated around
its vertical axis (mirror image).
Focal length:
Everything that magnifi es an object via an optic (lens)
has a certain focal length (FL). The FL is the length of
the path the light travels from the surface of the lens
to its focal point. The focal point is also referred to as
the focus. In focus, the image is clear. In the case of
a telescope, the FL of the telescope tube and the
eyepieces are combined.
Lens:
The lens turns the light which falls on it around in
such a way that the light gives a clear image in the
focal point after it has travelled a certain distance
(focal length).
Eyepiece:
An eyepiece is a system made for your eye and
comprised of one or more lenses. In an eyepiece, the
clear image that is generated in the focal point of a
lens is captured and magnifi ed still more.
There is a simple formula for calculating the magnifi cation:
Focal length of the telescope tube, divided by, Focal
length of the eyepiece = Magnifi cation
You see: In a telescope, the magnifi cation depends on
both the focal length of the telescope tube and the
focal length of the eyepiece.
Magnifi cation:
The magnifi cation corresponds to the difference
between observation with the naked eye and
observation through a magnifi cation apparatus (e.g.
a telescope). In this scheme, observation with the eye
is considered "single",
Accordingly, if a telescope has a magnifi cation of 30x,
then an object viewed through the telescope will
appear 30 times larger than it would with the naked
eye. See also "Eyepiece."
or 1x magnifi cation.
5

Troubleshooting:

Problem: Advice:
No picture
Remove dust protection
cap and sun-shield from
the objective opening.
Blurred picture
Adjust focus using focus
ring
No focus possible Wait for temperature to
balance out
Bad picture Never observe through a
glass surface
Viewing object visible Adjust fi nder
in the fi nder, but not
through the telescope
DISPOSAL
Dispose of the packaging materials
properly, according to their type (paper,
cardboard, etc).
Contact your local waste disposal service
or environmental authority for information
on the proper disposal.
Please take the current legal regulations
into account when disposing of your
device. You can get more information
on the proper disposal from your local
waste disposal service or environmental
authority.
Product Manual, Planisphere &
Astro Software Visit:
www.exploreone.com/pages/product-manuals
Astro Software CD