Explanation

• Different colors of light travel at different speeds, and different lenses reduce the speed of light. This can result in a dispersion of the light known as lens color fringing, or chromatic aberration.
  
  

Cause

• Some lenses' magnification changes for each wavelength of color. This leads to color fringes.
  
  

Purple Fringing

• Purple fringing occurs frequently in digital photography. It appears as a blurred purple border around part of photograph.
  
  

Lenses

• Using ultrawide angle and true telephoto lenses increases the likelihood of lens color fringing. Some cameras correct this automatically, but others require you to fix the picture using a program.
  
  

Solutions

• Several photo editing programs have a function for correcting lens color fringe. Some sample programs are Adobe Photoshop, Adobe Lightroom and Picture Window Pro. Use the program's help function to locate the function.