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anastigmatic


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Describing a lens or optical system that has zero spherical aberration, coma (see Coma, Optical), and astigmatism. Certain designs of Maksutov and Schmidt–Cassegrain telescope are anastigmats, as are all photographic lenses. Anastigmats usually have at least three optical elements, and often many more.

Subjects: Astronomy and Astrophysics.


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