Discovery Kids TDK23 Руководство по эксплуатации - Страница 3
Просмотреть онлайн или скачать pdf Руководство по эксплуатации для Телескоп Discovery Kids TDK23. Discovery Kids TDK23 4 страницы. 40mm astronomical telescope
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Helpful Hints
1. The best way to use your telescope
is outside, because viewing
through windows (even if they
are open) can be distorted by
reflections from the glass or
by air currents (differing
temperatures) passing
through a window.
2. Let your telescope adjust to
the outside temperature before
use. Your telescope will work
better if the lenses and the air
inside the tube are the same
temperature as outside, so give it
up to 30 minutes to equalise.
3. Try to find a viewing spot that is
away from glaring lights. If you live
in a city, your viewing can be
reduced by too much lighting,
and it's best to use the
telescope where it is as dark
as possible.
4. Try to avoid sudden
changes of temperature,
VERSIONS THAT SHOWED
as this may cause
condensation on your
lens (for example,
carrying your telescope
in from a very cold wintry
outside to a very warm house
interior). If this occurs, leave
the lens cap off, tilt the lens face
down and wait till the telescope
reaches room temperature before
storing it.
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THE BEST TIME
TO LOOK AT THE
MOON IS WHEN IT IS
LESS THAN HALF FULL,
BECAUSE THE DIVIDING LINE
BETWEEN THE DARK AND
LIGHT OF THE MOON CALLED
THE TERMINATOR SHOWS
THE BEST DETAIL IN
THE CRATERS AND
MOUNTAINS.
TELESCOPES
HAVE BEEN USED
FOR HUNDREDS OF
YEARS. IT WAS EARLY
THAT EARTH WAS NOT
THE CENTRE OF THE
UNIVERSE, AS WAS
PREVIOUSLY
BELIEVED.
About Magnification
The magnification 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. To calculate
the magnification of your telescope with
any particular eyepiece, simply divide the
focal length of the telescope (500mm) by
the focal length of the eyepiece (indicated
in 'mm' on the eyepiece collar).
500mm focal length tube
Example
20mm focal length eyepiece
The two eyepieces included provide
the following magnification:
MODERN
TELESCOPES
LIKE NASA'S HUBBLE
SPACE TELESCOPE
PROVIDE EVIDENCE
OF BILLIONS OF
GALAXIES, EACH CON
TAINING BILLIONS
OF STARS LIKE
OUR SUN.
Inspired by
VIEW THE
MOON, STARS
AND OTHER
PLANETS WITH THIS
25 TO 50X
TELESCOPE
= 25X magnification
10mm eyepiece
= 50X
20mm eyepiece
= 25X
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