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Choosing and Using a Refracting Telescope (Paperback, 2011 ed.)
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Choosing and Using a Refracting Telescope (Paperback, 2011 ed.)
Series: The Patrick Moore Practical Astronomy Series
Expected to ship within 10 - 15 working days
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Choosing and Using a Refracting Telescope has been written for the
many amateur astronomers who already own, or are intending to
purchase, a refracting telescope - perhaps to complement their
existing arsenal of larger reflecting telescopes - or for the
specialist who requires a particular refractor for serious
astronomical applications or nature studies. Four hundred year ago,
during the winter of 1609, a relatively unknown Italian scientist,
Galileo Galilei designed a spyglass with two crude lenses and
turned it skyward. Since then, refractors have retained their
dominance over all types of reflector in studies of the Moon,
planets and double stars because of the precision of their optics
and lack of a central obstruction in the optical path, which causes
diffraction effects in all commercially-made reflectors. Most
mature amateur astronomers got started with a 60mm refractor, or
something similar. Thirty years ago, there was little choice
available to the hobbyist, but in the last decade long focus
crown-flint achromats have moved aside for some exquisitely crafted
apochromatic designs offered by leading commercial manufacturers.
There has been a huge increase in the popularity of these
telescopes in the last few years, led by a significant increase in
the number of companies (particularly, William Optics, Orion USA,
StellarVue, SkyWatcher and AstroTech) who are now heavily marketing
refractors in the amateur astronomical magazines. In Choosing and
Using a Refracting Telescope, well-known observer and astronomy
writer Neil English celebrates the remarkable history and evolution
of the refracting telescope and looks in detail at the instruments,
their development and their use. A major feature of this book is
the way it compares not only different classes of refractor, but
also telescopes of each class that are sold by various commercial
manufacturers. The author is perhaps uniquely placed to do this,
having used and tested literally hundreds of different refracting
telescopes over three decades. Because it includes many diverse
subjects such as imaging with consumer-level digital cameras,
imaging with webcams, and imaging with astronomical CCD cameras -
that are not covered together in equal depth in any other single
volume - Choosing and Using a Refracting Telescope could become the
'refractor bible' for amateur astronomers at all levels, especially
those who are interested in imaging astronomical objects of every
class.
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