Apertura Dobsonian Telescope, Руководство пользователя

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Eyepiece Selection
Your Apertura™ Dobsonian Telescope comes standard with two eyepieces: a 2”
diameter wide field, low-power eyepiece with a 30mm focal length and a 1.25”
diameter high-power eyepiece with a 9mm focal length. To get the best results from
your telescope, always start with your widest field (lowest power) eyepiece, then work
your way up to the higher power eyepiece, keeping the image centered throughout.
35mm Extension Tube : This is used with low-power eyepieces to extend the focal
length, making it possible to focus at low magnification. The 35mm Extension Tube fits
into the 2” opening of the focuser and then accepts 2” eyepieces, or 1.25” eyepieces
with the 1.25” adapter installed.
Deep-sky objects are best observed with medium magnification due to their dimness at
higher magnifications. Astronomical points of interest within our solar system are good
candidates for higher magnification because they are generally brighter than deep sky
objects. Of course, experimentation is always the most rewarding approach to
determining eyepiece selection.
Observation Tips
Your telescope will perform best when local artificial lighting is kept to a minimum.
Nearby streetlights and lighted buildings cause a lot of light pollution and will degrade
the quality of your view with your telescope.
When choosing a viewing location, try to find a spot far away from tall structures with a
wide view of the open sky.
Allow your eyes time to adjust to the darkness before you expect to see any faint
objects of the night sky. Usually 30 minutes is long enough for your eyes to totally adapt
to the dark. Preserve your dark-adapted vision by avoiding looking at sources of light
(street lights, cell phones, computers, etc.). If you are exposed to a light source, the
adjustment period will begin again. After your eyes have reached their dark-adapted
state you’ll want to consider using a red-lens light source for activity in the dark.
Acclimating Your Telescope
Before using your telescope, you should allow its temperature to equalize to that of the