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Color Shading on a Digital Sensor

Color shading occurs with a digital sensor; it is vignetting by color due to ray angle to the digital sensor.

Even cameras with dedicated and optimized lenses such as the Sony RX1/RX1R with Zeiss 35/2 Biogon can show some color shading due to ray angle.

Examples

From both rangefinder and DSLR cameras.

The Zeiss ZM 21mm f/4.5 C-Biogon rangefinder lens has a particularly unfriendly (extreme) ray angle which causes strong color shifts into the corners. Observe the strong magenta cast which develops at the edges and corners.

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  • 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.

Color shading
Leica M9 + Zeiss ZM 21mm f/4.5 C-Biogon @ ~f/8

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