by Bart Arondson

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Purple fringe most commonly happens with fast lenses used wide open shooting directly into a source of light. They generally show up around areas with blown highlights, so the two easiest things you can do to reduce fringing are to a) stop the lens down to a smaller aperture, and b) avoid blowing any highlights. Purple fringe is also known as longitudinal ...


The purple tinge to the lights in your photograph has been caused by longitudinal chromatic aberration, which results when using a wide aperture, meaning the blue and red components of the spectrum are not focused as sharply as the rest. It can also manifest as a green tinge, or even both where there are specular highlights either side of the plane of focus. ...


Chromatic aberrations are caused by different wave lengths (in this case representative of colors) being manipulated slightly differently by your lens and thus arriving at the sensor in slightly different locations. As such, they are intrinsically attributes of your lens. You can minimize them by not adding unnecessary glass (cheap filters mostly) and by ...

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