A simple coma corrector for off-axis guiding

Astronomy and Astrophysics – Astronomy

Scientific paper

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Aberration, Image Enhancement, Optical Correction Procedure, Parabolic Reflectors, Reflecting Telescopes, Stellar Spectrophotometry, Astigmatism, Astrometry, Axes (Reference Lines), Instrument Errors, Lenses, Stellar Luminosity

Scientific paper

An adjustable coma and astigmatism corrector, using two small simple
lenses, and suitable for correcting the image of an off-axis guide star
up to about 1 deg from the axis of a paraboloidal reflector, is
described. The on-axis image is not obscured, and retains its
seeing-limited quality, achromatism and high efficiency.

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