- Types:
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reflecting telescope, reflector
optical telescope consisting of a large concave mirror that produces an image that is magnified by the eyepiece
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refracting telescope
optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece
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Cassegrainian telescope, Gregorian telescope
a reflecting telescope that has a paraboloidal primary mirror and a hyperboloidal secondary mirror; light is brought to a focus through an aperture in the center of the primary mirror
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coude system, coude telescope
a reflecting telescope so constructed that the light is led to a plate holder or spectrograph
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field glass, glass, spyglass
a small refracting telescope
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Galilean telescope
a type of refracting telescope that is no longer used in astronomy
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Herschelian telescope, off-axis reflector
a reflecting telescope with the mirror slightly tilted to throw the image to the side where it can be viewed
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Maksutov telescope
reflecting telescope in which the aberration of the concave mirror is reduced by a meniscus lens
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Newtonian reflector, Newtonian telescope
reflecting telescope in which the image is viewed through an eyepiece perpendicular to main axis
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Schmidt camera, Schmidt telescope
reflecting telescope that has plate that corrects for aberration so a wide area of sky can be photographed