Meade Instruments StarPro AZ Serie Manual De Instrucciones página 15

Sometimes, astronomers use focal reducers
to make slow exposure telescopes have
faster focal ratios.
Alt-azimuth mounting simply means your
telescope moves up and down (altitude
or "alt"), and side to side, (azimuth or "az").
Other mounting configurations are available
for other telescopes, such as equatorial
mounting.
USE THE SPECIFICATIONS TO
CALCULATE THE MAGNIFICATION OF
YOUR EYEPIECE
The power of a telescope is how much it
magnifies objects. For an StarPro ™ AZ 90,
the 26mm eyepiece magnifies an object 23.1
times. The 9mm eyepiece magnifies objects
66.7 times.
If you obtain other eyepieces, you can
calculate how much magnification they have
with your telescope. Just divide the focal
length of the telescope by the focal length of
the eyepiece.
Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.
Focal Length of the Telescope
÷
Focal Length of the Eyepiece
=
Magnification
Look at the specifications.
StarPro ™ AZ 90, you will see that the focal
length of this scope is 600mm. Let's say that
you have obtained a 13mm eyepiece. You
can tell that what the focal length of your
eyepiece is as it is always printed on the
side of an eyepiece. Divide: 600 ÷ 13, which
equals 46.15. Round this off to the nearest
whole number and the new 13mm eyepiece
magnifies objects 46 times.
A great accessory for your telescope
is a Barlow lens If you use a Barlow lens
with one of your eyepieces, it doubles the
magnification of your eyepiece. Other types
of Barlows can triple or further increase the
power of an eyepiece. To find out how much
the magnification is when you use a Barlow,
multiply your eyepiece's magnification
by two.
Eyepiece's magnification x 2
=
Magnification with a 2X Barlow lens
For the StarPro ™ AZ 90 the 26mm low-
power eyepiece magnifies an object 23
times. Multiply 23 by 2 and you get 46
times magnification with a Barlow.
For the
It's worth repeating: Keep in mind that a
bright, clear, but smaller image is more
interesting than a larger, dimmer, fuzzy
one. Using too high a power eyepiece is
one of the most common mistakes made
by new astronomers. So don't think that
higher magnification is necessarily better—
quite often the best view is with lower
JOIN AN ASTRONOMY CLUB, ATTEND
One of the best ways to increase your knowledge of
astronomy is to join an astronomy club. Check your
local newspaper, school, library, or telescope dealer/
store to find out if there's a club in your area.
Many groups also hold regularly scheduled Star
Parties at which you can check out and observe
with many different telescopes and other pieces of
astronomical equipment. Magazines such as Sky and
Telescope and Astronomy print schedules for many
popular Star Parties around the United States and
Canada.
13
A STAR PARTY