By Martin Peston
This publication bargains a complete introductory advisor to "choosing and using" a sequence LXD55 or LXD75 computer-controlled ("goto") telescope, containing a wealth of priceless details for either rookies and extra complicated functional beginner astronomers. The manufacturer’s manuals aren't approximately exact sufficient to be of actual aid to newbies. No different booklet bargains complex suggestions for more matured LXD sequence users.
Read Online or Download A User's Guide to the Meade LXD55 and LXD75 Telescopes (The Patrick Moore Practical Astronomy Series) PDF
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Additional info for A User's Guide to the Meade LXD55 and LXD75 Telescopes (The Patrick Moore Practical Astronomy Series)
It normally takes longer to assemble the feet sections, unlike a tripod which can fold down in one step. The stand is not usually transported in one single piece due to its size and sheer weight when fully assembled. However, this does not deter those who are eager to transport these stands to any location in order to provide the ultimate stability for their instruments. 38 A User's Guide to the Meade LXD55 and LXD75 Telescopes A permanent type of pillar stand is the pier stand. A pier stand is primarily used in amateur observatories or locations where a permanent base is required.
Refractors with primary objectives containing Fluorite are known as apochromatic refractors (APOs for abbreviation). APOs provide relative color free images of all bright celestial objects. Fluorite however does not come cheap and so the price to pay for quality of image is somewhat higher. Nowadays achromatic refractors have been manufactured with very short focal lengths, some almost halfthe usual size. These are very portable instruments, but they suffer from chromatic aberration. In fact, the shorter the focal length the more severe is the effect.
This is to achieve a comfortable position for the observer looking through the eyepiece at the bottom end of the telescope. A reflector having the focus mount located near the top of the telescope tube , should have the tripod legs set at a lower height, to provide more comfortable viewing. Setting up a tripod is more or less straight-forward. Minor adjustments to the height of the legs are necessary to make sure the telescope and mount assembly is level with the ground. All three legs must be adjusted until leveling is achieved.
A User's Guide to the Meade LXD55 and LXD75 Telescopes (The Patrick Moore Practical Astronomy Series) by Martin Peston