This entry was posted on decembrie 25, 2008 by roseinthedesert. It was filed under supranatural and was tagged with angel, inger.

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1. 

   Adrian

   Lens flare is the light scattered in lens systems through generally unwanted image formation mechanisms, such as internal reflection and scattering from material inhomogeneities in the lens. These mechanisms differ from the intended image formation mechanism that depends on refraction of the image rays. Flare manifests itself in two ways: firstly as a haze across the image, making the image look “washed out” by reducing contrast and color saturation (adding light to dark image regions, and adding white to saturated regions, reducing their saturation), and secondly as visible artifacts.

   Flare is particularly caused by a very bright light sources either in the image – which produces visible artifacts – or shining into the lens but not in the image – which produces a haze. Most commonly, this occurs when shooting into the sun (when the sun is in frame or the lens is pointed in the direction of the sun), and is reduced by using a lens hood or other shade.

   For good optical systems and most images (which do not have a bright light shining into the lens), flare is a secondary effect that is widely distributed across the image and thus not visible, though it reduces contrast. Lenses with large numbers of elements such as zooms tend to exhibit greater lens flare, as they contain multiple surfaces at which unwanted internal scattering occurs.

   iulie 26, 2010 la 3:39 pm
   

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