Chromatic aberration

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On top is corner detail in a photograph taken with a higher quality lens; bottom is a similar photograph taken with a wide angle lens showing severe visible lateral chromatic aberration. The effect is pronounced on the right side of the building's roof, where a long blue streak is visible.

In optics, chromatic aberration (CA, also called achromatism or chromatic distortion) is a type of distortion in which there is a failure of a lens to focus all colors to the same convergence point. It occurs because lenses have a different refractive index for different wavelengths of light (the dispersion of the lens). The refractive index decreases with increasing wavelength.

• See also: Wikipedia, Commons

• Related: Aberration in optical systems, Achromatic lens, Achromatic telescope, Apochromatic lens, Cooke triplet, Superachromat

Explanation of chromatic aberration by Paul van Wa... Explanation of chromatic aberration by Paul van Walree toothwalker.org/optics/chromatic.html - Web

PanoTools Wiki article about chromatic aberration PanoTools Wiki article about chromatic aberration wiki.panotools.org/Chromatic_aberration - Web

A video explanation of chromatic aberration A video explanation of chromatic aberration doflick.com/ViewVideo.aspx?vId=277 - Web

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