It is quite simple in design, resulting in very large apertures at the lowest cost per unit of aperture of any type of telescope. Although heavier and somewhat more difficult to transport than similar sized compound telescopes, the Newtonian is preferred by many astronomers who want large aperture at moderate cost. Six and eight inch Newtonians are easily carried in an automobile, as the tube detaches from the mounting in seconds. Newtonians are generally not suited to earthly observing, as the image is rotated and usually upside-down or sideways. Newtonian reflectors need occasional cleaning and realignment, but you can easily do this yourself.
Optical performance is excellent.
The large aperture makes them ideal for deep-space views of galaxies, star clusters, and nebulas. The simple optical design results in sharp, high-contrast planetary and lunar views, too. They give very bright, sharp images, can be hand-held or used with simple bases or mounts, and are less prone to vibration than other telescopes. The wide field of view makes it easier to locate an object. The lack of high magnification is largely compensated by the sharper, brighter images and superior light-gathering power.