Värireunuksia

Värireunuksia is a Finnish term that translates to "colored edges" or "color fringes." It most commonly refers to optical phenomena observed when light passes through or reflects off certain materials. Specifically, it can describe the chromatic aberration seen in lenses where different wavelengths of light are refracted at slightly different angles, resulting in a rainbow-like halo around objects. This effect is particularly noticeable with strong contrast, such as dark objects against a bright background.

In photography, värireunuksia is an undesirable artifact that camera lenses, especially those of lower quality or with certain designs, can produce. Photographers often refer to this as "chromatic aberration" and seek to minimize it through lens coatings or post-processing techniques. The effect can vary depending on the lens's aperture and focal length.

Beyond optics, the term can also be used more generally to describe any visual effect where distinct colored borders appear around an object or area. This might include certain types of artistic printing or display technologies where color separation occurs. However, the optical context of chromatic aberration is its primary and most frequent application.