Cassegrain spotting scopes are useful for birding and astronomy.
Cassegrain telescopes, including spotting scopes, use a set of mirrors to bend light and produce a strikingly sharp image. According to Woden Optics, these types of telescopes originated in the 17th century and are still in use. Because of the unique advantages that they offer, the telescopes are popular with professional and amateur astronomers as well as bird-watchers and hunters.
Image Clarity
According to Woden Optics, coaxial reflectors of different shapes in the Cassegrain telescope bend light and project it through a tiny hole into the scope's eyepiece, rendering it in exceptional clarity. One of the mirrors in the system acts as a "glass plate supporter," which prevents distortions and refractions of the image.
Size
According to Celestron, Cassegrain telescopes and spotting scopes are in a class of optics called catadioptrics, which use a series of lenses to fold light and produce an image. According to Christophers Ltd., "The combination of lenses and mirrors in a catadioptric spotting scope folds a long focal length into a short package, giving you high visual magnification and exceptional telephoto lens performance without excessive bulk." The compact size and clarity of the image make Cassegrain spotting scopes useful for activities such as birding and hunting.
Price and Utility
According to Scope Reviews, Cassegrain spotting scopes are highly popular, less expensive than other types of optics and have a wide variety of aftermarket accessories available for customization. In addition, different models of Cassegrain spotting scopes may be connected to and directed by computer software for different tasks.
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