Star Tests

Star tests are optical tests used to evaluate the quality of a telescope's optics. The test involves observing a bright star and examining the resulting image for distortions or aberrations. The star's image should appear as a small, round point of light, known as an Airy disk, surrounded by a series of concentric rings. Any deviations from this pattern can indicate problems with the telescope's optics, such as astigmatism, coma, or spherical aberration. Star tests are an important tool for amateur and professional astronomers alike, as they can help identify issues with a telescope's optics and guide adjustments or repairs to improve its performance.

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Star Tests

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