Discovery Sky T50 с книгой 77830 [12/56] En discovery sky telescopes
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Discovery Sky T50 с книгой 77830 [12/56] En discovery sky telescopes

Discovery Sky T50 с книгой [12/56] En discovery sky telescopes
12
EN
DISCOVERY SKY TELESCOPES
All parts of the telescope will arrive in one box. Be careful when unpacking it. We recommend keeping
the original shipping containers. In the event that the telescope needs to be shipped to another location,
having the proper shipping containers will help ensure that your telescope survives the journey intact.
Be sure to check the box carefully, as some parts are small. All screws should be tightened securely to
eliminate exing and wobbling, but be careful not to overtighten them, as that may strip the threads.
During assembly (and anytime, for that matter), do not touch the surfaces of the optical elements with
your ngers. The optical surfaces have delicate coatings on them that can easily be damaged if touched.
Never remove lenses or mirrors from their housing, or the product warranty will be null and void.
Mount assembly
Mount without a fork (g. 2a):
• On the lower part of the tube, there is a mounting plate with a threaded hole. Align it with the
fastening screw of the tripod.
• Screw the tripod fastening screw into the hole on the tube mounting plate in order to secure the
telescope tube.
• Do not overtighten the screw because you might accidently damage the screw thread.
Fork mount (g. 2b):
• Remove the locking screw from the slow-motion control rod.
• Insert the rod into the hole on the side of the fork mount.
• Place the telescope tube between fork arms so that holes on the tube match the arm holes. Fasten
the telescope tube to the mount with thumbscrews.
• Fasten the other end of the rod to the telescope tube by inserting the screw through shaft and tube
holes and tightening it.
Optical accessories assembly
Your telescope can be equipped with additional accessories, such as eyepieces, diagonal mirror or prism,
or a Barlow lens. The accessories should be installed in well-dened ordering.
Refractors (g. 1a, 1b): Loosen the focuser thumbscrew. Insert the diagonal mirror into the focuser tube
and retighten the thumbscrew to hold the diagonal mirror in place (g. 4a). Then, insert the desired
eyepiece into the diagonal mirror and secure it by retightening the thumbscrew. If a Barlow lens is
needed, install it between the diagonal mirror and the eyepiece. You can use the erecting eyepiece to
get a direct image.
Reectors (g. 1c): Loosen the focuser thumbscrew and take o the plastic cap from the focuser tube.
Insert the selected eyepiece and secure it by retightening the thumbscrew (g. 4b). If a Barlow lens is
needed, install it between the focuser and the eyepiece.
Barlow lens
A Barlow lens increases the magnifying power of an eyepiece, while reducing the eld of view. It expands
the cone of the focused light before it reaches the focal point, so that the telescope’s focal length
appears longer to the eyepiece. In addition to increasing magnication, the benets of using a Barlow
lens include improved eye relief, and reduced spherical aberration of the eyepiece. For this reason,
a Barlow plus a lens often outperform a single lens producing the same magnication. And the best
advantage is that a Barlow lens can potentially double the number of eyepieces in your collection.
CAUTION! Never look directly at the Sun — even for an instant — through your
telescope or nderscope without a professionally made solar lter that completely
covers the front of the instrument, or permanent eye damage may result. To avoid
damage to the internal parts of your telescope, make sure the front end of the
nderscope is covered with aluminum foil or another non-transparent material.
Children should use the telescope under adult supervision only.

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