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The optical design of a telescope is a feature that defines what sort of observing the telescope is suitable for. Göbekli Tepe (Turkish: [ɟœbecˈli teˈpe], "Potbelly Hill"), also known as Girê Mirazan or Xirabreşkê (Kurdish), is an archaeological site in the Southeastern Anatolia Region of Turkey approximately 12 km (7 mi) northeast of the city of Şanlıurfa.The tell (artificial mound) has a height of 15 m (50 ft) and is about 300 m (1,000 ft) in diameter. Schmidt-Cassegrain Design. The most popular designs are: Schmidt-Cassegrain – it uses a combination of a spherical primary mirror and a secondary mirror. So let us find out which one is best suited to your needs and your budget so you can start searching the night sky! With the wide choice available, it is a challenge to decide which is best for you. The corrector plate is an aspheric lens, which helps to correct the spherical aberration. This is due to the versatility and compactness of the optical design. Schmidt-Cassegrains telescopes (SCTs) have become one of the most popular types of telescopes. The reason you’re here right now is likely so you can understand what separates the designs from each other and ultimately learn which optical variation will be better for specific scenarios. SCTs are only about twice as long as their aperture, making them highly portable. One amazing thing about these telescopes is the fact that their close tube design prevents air currents from degrading the image. Schmidt-Cassegrain telescopes are top quality instruments for both beginner and experienced astronomers. The optical system fitted within a Schmidt Cassegrain telescope is a zero-power corrector plate. The Schmidt Cassegrain Telescopes (SCT) also rely on a combination of mirrors and lenses. We have reviewed the 5 best Schmidt-Cassegrain telescopes, giving a summary of each. These telescopes have the most modern design that combines the advantages of both lenses. This consists of a spherical primary mirror and a secondary mirror. We take a look at some of the best Schmidt Cassegrain telescope options to see what they can do to make your astronomy journey more memorable. For a more basic overview of these designs please see the Schmidt-Cassegrain page and Schmidt-Newtonian page. The compact design makes it very portable for its given aperture, which adds to its marketability. The typical focal ratio is f/10, f/2. And for that, you need a Schmidt-Cassegrain telescope to provide you with mobility as well as great quality images. There are a few different sub variations to a compound/catadioptric telescopes but the ones most modern systems use are the Schmidt-Cassegrain (SCT) and Maksutov-cassegrain (Mak) optics. They are also well-suited to a number of applications including photography and terrestrial observing as well as stargazing. You need to consider price, features, and portability. Schmidt-Cassegrains have a focal ratio of 10, making them perfect for deep sky observing and astrophotography. Above: Optical layout of a typical Schmidt-Cassegrain telescope This section details the optical design and inherent aberrations of Schmidt-type catadioptric telescopes. The Schmidt–Cassegrain design is very popular with consumer telescope manufacturers because it combines easy-to-manufacture spherical optical surfaces to create an instrument with the long focal length of a refracting telescope with the lower cost per aperture of a reflecting telescope. Including photography and terrestrial observing as well as great quality images of the optical design and inherent of... Of a telescope is a zero-power corrector plate is a feature that defines what sort of observing the telescope a... Secondary mirror and portability experienced astronomers Cassegrain telescopes ( SCT ) also on. 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