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Removing lateral chromatic aberration
(Adobe Photoshop, ACR)

How to Correct Color Fringing in Adobe Camera RAW

Color fringing (lateral chromatic aberration) manifests as a red fringe on one side and a cyan fringe on the other side of high contrast edges. A blue/yellow fringe is also possible, but much less common, and usually much less visible. The blur caused by color fringing can be barely visible, or strong enough to cause eyestrain as with an out-of-register printed newspaper.

Lateral chromatic aberration does not improve with stopping down. Rather, it often becomes more visible as image quality improves with stopping down.

There exist other types of color aberrations such as longitudinal (axial) chromatic aberration (LOCA, or differential color focus). LOCA improves with stopping down; it is quickly mitigated by depth of field.

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  • Covers aspects of digital sensor technology that relate to getting the best image quality.
  • Technique section discusses every aspect of making a sharp image handheld or on a tripod.
  • Depth of field and how to bypass depth of field limitations via focus stacking.
  • Optical aberrations: what they are, what they look like, and what to do about them.
  • MTF, field curvature, focus shift: insight into the limitations of lab tests and why imaging performance is far more complex than it appears.
  • Optical aberrations: what they are, what they look like, and what to do about them.
  • How to test a lens for a “bad sample”.

Intrigued? See Focusing Zeiss DSLR Lenses For Peak Performance, PART ONE: The Challenges, or (one topic of many) field curvature.

Variants Color Fringing, Corrected for Color Fringing available in full article

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