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- ===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 a8 KB (1,409 words) - 13:10, 4 February 2020
- ====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 th8 KB (1,285 words) - 22:07, 17 May 2019
- ...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 con7 KB (1,162 words) - 17:38, 20 May 2019
- ...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