About Chromatic Aberration

• Lateral CA: Color fringing at edges, worse toward corners - correctable in post
• Longitudinal CA: Color fringing in front/behind focus plane - harder to correct
• Red/Cyan: Indicates lateral CA, common in wide-angle lenses
• Blue/Yellow: Indicates longitudinal CA, common at wide apertures

Prevention Tips

• Use higher quality lenses with APO or ED glass elements
• Stop down aperture (f/5.6 - f/8 typically reduces CA)
• Avoid shooting high-contrast scenes at extreme edges
• Enable automatic lens corrections in your RAW processor