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Coma of a single lens. Each cone of light focuses on different planes along the optical axis. In optics (especially telescopes), the coma (/ ˈ k oʊ m ə /), or comatic aberration, in an optical system refers to aberration inherent to certain optical designs or due to imperfection in the lens or other components that results in off-axis point sources such as stars appearing distorted ...
In most cases, two thin lenses are combined, one of which has just so strong a positive aberration (under-correction, vide supra) as the other a negative; the first must be a positive lens and the second a negative lens; the powers, however: may differ, so that the desired effect of the lens is maintained. It is generally an advantage to secure ...
A photographic lens is usually composed of several lens elements, which combine to reduce the effects of chromatic aberration, coma, spherical aberration, and other aberrations. A simple example is the three-element Cooke triplet, still in use over a century after it was first designed, but many current photographic lenses are much more complex.
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Do women still get their periods while in a coma? The question took social media by storm after it was posted by user @CloudxRaven last Monday (December 2), garnering almost 24 million views with ...
Lomography is a photographic style which involves taking spontaneous photographs with minimal attention to technical details. Lomographic images often exploit the unpredictable, non-standard optical traits of toy cameras (such as light leaks and irregular lens alignment), and non-standard film processing techniques for aesthetic effect.
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