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• Exit Pupil
  ===Exit Pupil and Astigmatism=== ...m in your vision, it typically becomes worse the larger the exit pupil is. Astigmatism in astronomy can be particularly annoying because it causes stars to have a
  8 KB (1,409 words) - 13:10, 4 February 2020
• Field of View
  ====Astigmatism==== ...io telescopes, the more strongly this light has to be bent. This can cause astigmatism, where stars appear cross-like or streak-like the closer you get towards th
  8 KB (1,285 words) - 22:07, 17 May 2019
• Focal Ratio
  ...rom the telescope can distort it, which can cause an aberration known as [[astigmatism]] to manifest near the edges of the [[field of view]]. The steeper this con
  7 KB (1,162 words) - 17:38, 20 May 2019
• Barlow
  ...cted. The additional glass elements of the focal extender also correct for astigmatism and chromatic aberration that can be found in simpler Barlow designs.
  6 KB (1,062 words) - 21:57, 20 May 2019