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Most Celestron refractor telescopes come in both Catadioptic types, in 90mm options to give you a superior viewing experience. Catadioptric telescopes come in two main types, Schmidt-Cassegrain and Maksutov.
With catadioptric (Cassegrain) telescopes, you can view true-to-life images day or night. Some Vivitar refractor telescopes come with options for terrestrial and astrological viewing, microscope kits, and sun shields. Using solar telescopes with apochromatic lenses produces detailed views of the sun, and attachments like webcams for computerized telescopes provide high-resolution results for safe viewing. Lenses created with three to four glass elements are apochromatic, and an apochromatic refractor produces high-resolution images with minimal chance of discoloration. Achromatic telescopes are more suitable for star gazing as less light is present, so there’s a limited chance of discoloration taking place.
The green wavelengths extend past the red and blue ones and focus on a different area at the back of the telescope. Color wavelengths in achromatic telescopes don’t all align due to the angles, which creates an opportunity for discoloration (chromatic aberration). Achromatic telescopes are more prone to discoloration than apochromatic telescopes because the red and blue wavelengths are not in line with the green ones.ĭifference Between Apochromatic and Achromatic TelescopesĪchromatic refractors bend light at slightly different angles as it passes through a glass lens. The best refractor telescopes use a long-range focal length to minimize the chance of chromatic aberration. A refractor telescope has a glass lens at the front that bends light as it passes through.
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