![]() ![]() Full computerized go-to slewing, dual-axis tracking, high-quality focusers and optics. These modern designs offer a wide range of sophisticated features. Such a telescope allows for stunning views of nebulae and galaxies that smaller telescopes simply cannot replicate. Many serious visual deep-sky observers own Dobsonian telescopes, with many owning apertures in the 20-inch (50cm) to 30-inch (70cm) range. One especially notable point in the Dobsonian design is it allows the amateur the possibility of owning a really large telescope. The Skywatcher synscan 400p Dobsonian telescope is a GoTo unit with a large aperture (Image credit: Skywatcher) Objects can be quickly located and they are great for hopping from one target to the next. They are especially popular among those who enjoy observing galaxies and nebulae as very large apertures can be fabricated, up to around 40-inch (100cm) in some cases. I can recall many fine views through Dobsonian telescopes over the years.ĭobsonian's are generally employed by visual observers who have a keen interest in the visual observation of celestial targets. Fortunately, most come with instructions on how to collimate the telescope accurately and there is plenty of further information online for those struggling.Ī 10-inch to 12-inch (25-30cm) Dobsonian can give a lifetime of viewing enjoyment and will offer significantly more impressive views than for example a 4-inch or 5-inch (10-13cm) refracting telescope, especially under dark/steady skies. This can be a confusing and frustrating process for the beginner as it requires time and patience to achieve. With the telescope being a Newtonian design, it means the optical system must be collimated to perform at its very best. Amateurs have produced Dobsonian's in some truly enormous sizes. The author alongside a massive 36-inch Dobsonian telescope nicknamed 'The Yardscope'.
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