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Dobsonian
Dobsonian
A
Dobsonian telescope
is an
altazimuth-mounted
Newtonian telescope
design popularized by
John Dobson
starting in the 1960s and credited with vastly increasing the size of 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 visually observing faint,
deep-sky objects
such as
nebulae
and
galaxies
. This type of observation requires a large
objective
diameter (i.e.
light-gathering power
) of relatively short focal length and portability for travel to relatively less
light-polluted
locations
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