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30-megapixel Canon EOS R
Canon RF 24-105mm f/4L IS USM

Color Fringing (Lateral Chromatic Aberration) with/without Correction

This page shows the color fringing (lateral chromatic aberration) of the Canon RF 24-105mm f/4L IS USM at various focal lengths.

The color fringing at the wide and telephoto ends is pronounced, reminiscent of the lenses I was relieved to replace with better ones a decade ago, like the original Canon 16-35mm f/2.8L. Bear in mind that the fringing seen here is on a relatively low resolution sensor (30 megapixels) at a time when 42/45/50 megapixel sensors have been out for years. The color fringing will be even more prominent on those higher resolution sensors and those to come.

Clearly Canon is counting on software correction (an all too common design shortcut these days), and it absolutely must be corrected at the wide and long ends. Why Canon sees fit to call this an “L” lens defies explanation. Major outer-zone focus shift, substantial field curvature plus color fringing? It’s not a persuasive story in favor of the Canon EOS R system. But at least Canon does not try to hide the issue by forcing/requiring correction during raw conversion, as do Nikon NIKKOR Z lenses and Zeiss Batis and many other vendors.

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Diglloyd Guide to Mirrorless offers comprehensive integrated coverage of most APS-C and full frame mirrorless cameras and lenses.

Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.

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  • Save money by choosing the right lens for your needs the first time, particularly with the numerous lenses available for Sony.
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  • Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
  • Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.

Want a preview? Click on any page below to see an excerpt as well as extensive blog coverage, for example on Sony.

Variants Uncorrected,Corrected available in full article
f9 @ 1/50 sec, ISO 100; 2018-10-13 15:17:44
Canon EOS R + RF24-105mm F4 L IS USM @ 24mm

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