Soft focus
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Soft focus is a term used in photography and optics to describe a lens flaw. A soft focus lens fails to bring a subject to a single sharp focus, producing an image that is vague and blury. Soft focus is also the name of the style of photograph produced by such a lens.
Use in photography
Although soft focus is a technical flaw, it is sometimes deliberately introduced into a lens as a gimmick or special effect. The resulting soft focus lens is used as an effect for "glamour" portrait photography, because the lack of sharp focus eliminates blemishes, and in atmospheric photography to produce a dream-like image.The effect of a soft focus lens is sometimes approximated by the use of diffusion filters or reproduced by post-processing procedures.
See also
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