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A Dobsonian telescope is an altazimuth-mounted Newtonian telescope design popularized by John Dobson starting in 1965 and credited with vastly increasing the size build...

A Dobsonian telescope is an altazimuth-mounted Newtonian telescope design popularized by John Dobson starting in 1965 and credited with vastly increasing the size build your own telescope richard berry pdf telescopes available to amateur astronomers. Dobson’s telescopes featured a simplified mechanical design that was easy to manufacture from readily available components to create a large, portable, low-cost telescope. The design is optimized for observing faint, deep-sky objects such as nebulae and galaxies.


Dobsonians are intended to be what is commonly called a “light bucket” operating at low magnification, and therefore the design omits features found in other amateur telescopes such as equatorial tracking. Dobsonians are popular in the amateur telescope making community, where the design was pioneered and continues to evolve.

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