Why does purple edge appear in photography and how to eliminate it?

The purple edge phenomenon is caused by the optical characteristics of the camera and the dispersion of the lens. In photography, when light passes through the lens, different colors of light will be refracted at different angles, which is dispersion. When shooting scenes in Gao Fancha, such as backlighting and night scenes, due to insufficient light, the camera will automatically adjust the exposure time, making the picture overexposed. At this time, the colors in the photo will be separated and purple edges will appear.

There are many ways to eliminate purple edges. Here are some common methods:

-Narrowing the aperture for shooting: Narrowing the aperture can reduce the dispersion phenomenon, thus reducing the occurrence of purple edge phenomenon.

-Use software to remove or reduce purple edges: AdobePhotoshop and Lightroom have special tools to remove or reduce purple edges.