Chromatic Aberration can also be referred to as the colour fringing, usually, chromatic aberration is the distortion of colours that exhibits outlines of unwanted colours along the edges of your subject in a photograph. There are different aberrations that cause different outlines of colours at the edge of the subject.
The inability of a lens to focus on any appeared white light of various focal lengths as that of the camera lens can cause the distortion of colours with different variations; in this case, you have the magenta in purple, red-green, blue-yellow fringing. This is caused by the refractive index of glass coupled with various wavelengths traveling through the lens at different speeds which causes difficulty in focusing.
Now how do you avoid chromatic aberration even while shooting because most colour fringing happens when shooting: this also applies to every other aspect which can be avoided at the early stage. Here’s how:
- Shooting using a narrow aperture prevents the colour in your image from being distorted. If you use a higher f-stop like f/5.6 and above, you will be lucky not to see it, and increasing your ISO and Shutter speed will balance up the lost light.
- Use a high-quality lens which has a very high f-stop and also comes with a wide range of focal length. Always optimize your focal length cause it will prevent you from having the chromatic effect.
- Avoid lenses with wide angle view, you will encounter the chromatic effects if you continue to use a lens with a less focal length such as 24mm, 50mm, and shooting a very long distance.
Also, you can remove the chromatic aberration using Lightroom, this can be done by clicking on the chromatic aberration under the lens correction panel. You can also remove the effect by clicking on the defringe icon located under the optics panel then use the fringe selector to sample the green or purple distortion and slide to remove the fringe.
