Celestron StarSeeker 80mm Manual de instrucciones - Página 11
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There are numerous optional eyepieces that are available to expand your range of magnification. There are
various types of eyepieces of varying quality to choose from.
B. Magnification through the telescope has its limits. These limits are determined by the laws of optics and the
nature of the human eye. The maximum usable power is equal to 60 times the aperture of the telescope (in
inches). So your telescope has a maximum useful power of 189x (3.15" x 60). You can create power
higher than this limit but the images will be dark and blurred.
The maximum power is used only under ideal conditions which are not common. Most of your viewing will
be done in the range of 15x to 140x. Higher powers are used mainly for lunar and planetary observing.
C. Your telescope also can use an optional 2x Barlow Lens - 1¼". The Barlow Lens doubles the power of any
1¼" eyepiece that you use.
1. To use the Barlow Lens, insert the chrome barrel end of the Barlow lens into the diagonal and secure
with the thumb screw. Then insert the eyepiece in the other end of the Barlow Lens and tighten the
thumb screw. This will yield a 2x power gain.
.
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TELESCOPE OPERATION — ASTRONOMICAL OBSERVING
After you have read and followed the instruction manual to this point, the telescope is set up and you are ready
to begin your observing adventure.
To enable you to find objects you should have a set of Star Charts. The location of the planets may appear in
local newspapers.
A. The Moon is an awesome first object to observe. The best observing occurs during the partial phases as a
full Moon is too bright.
At low power you can see the complete Moon and at high powers you can see lunar details such as mountain
ranges, crates and rills.
B. Five of the planets are easy targets for your telescope.
See Jupiter with its great red spot, study the cloud bands and watch its moons shuttle back and forth.
Study Saturn and its splendid ring structure.
Observe Mars and see its polar cap.
Watch Venus and Mercury as they go through their moon-like phases.
C. The Sun is quite safe to view if you utilize a proper solar filter. You can detect and watch the ever-
changing sunspot activity.
Remember to cover the finderscope when using a solar filter.
D. Deep-Sky objects (those outside our solar system) offer a lifetime of observing. There are hundreds of
objects within the realm of your telescope including open and closed star clusters, planetary and diffuse
nebulae, galaxies, double stars and occasional comets.
The amount of detail you can see is dependent on your observing site (dark sky rural locations are best),
atmospheric conditions, brightness of the object, collimation and your observing experience.
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