What does CA mean in Photography & Imaging?
This page is about the meanings of the acronym/abbreviation/shorthand CA in the Miscellaneous field in general and in the Photography & Imaging terminology in particular.
Chromatic Aberration
In optics, chromatic aberration (CA, also called chromatic distortion, and spherochromatism) is an effect resulting from dispersion in which there is a failure of a lens to focus all colors to the same convergence point.[1] It occurs because lenses have different refractive indices for different wavelengths of light. The refractive index of transparent materials decreases with increasing wavelength in degrees unique to each.[2] Chromatic aberration manifests itself as "fringes" of color along boundaries that separate dark and bright parts of the image, because each color in the optical spectrum cannot be focused at a single common point. Since the focal length f of a lens is dependent on the refractive index n, different wavelengths of light will be focused on different positions.[3]
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Definition
What does CA mean?
- calcium, Ca, atomic number 20(noun)
- a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
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