Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2023-03-25 12:47:09

Blur by Red/Cyan Fringes (Lateral Chromatic Aberration aka LACA)

Lateral chromatic aberration (LCA) results in red and cyan color fringes away from the center. Because LCA smears the same details (of different colors) across a larger area, image details are blurred.

LCA does not exist at optical center unless a lens is badly assembled. It worsens with the distance away from the optical center, showing its greatest effect at the edges and corners of a frame.

The red/cyan color fringes occur because the colors of light are split apart, as by a prism, causing a smeared and blurry look. While the cyan fringe is less obvious, the red fringe is most easily noticed.

For in-depth coverage of axial chromatic aberration, see:
Optical Aberrations— Lateral Chromatic Aberration
How to Test a Lens— Lateral Chromatic Aberration.

Article continues for subscribers...

Diglloyd Making Sharp Images is by yearly subscription. Subscribe now for about 13 cents a day ($50/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!

Diglloyd Making Sharp Images articulates years of best practices and how-to, painstakingly learned over a decade of camera and lens evaluation.

Save yourself those years of trial and error by jump-starting your photographic technical execution when making the image. The best lens or camera is handicapped if the photographer fails to master perfect shot discipline. High-resolution digital cameras are unforgiving of errors, at least if one wants the best possible results.

  • Eases into photographic challenges with an introductory section.
  • 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.

Lateral Chromatic Aberration (color fringing)
(Canon 16-35mm f/2.8L II)

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2022 diglloyd Inc, all rights reserved.