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Pattern Noise — Streaking and Banding (Grill)

See the picnic table example also.

This example is underexposed by ~2 stops. But it is also at ISO 100. When I shoot my Nikon bodies, I trust that ISO 100 will yield robust, clean files that I can use for severe adjustments if necessary; I often shoot on the edge of light handheld.

Test scene

Shown below is the scene as shot at ISO 100, 1/3000 second @ ƒ/1.2. Aperture ƒ/1.2 was chosen intentionally for a well-blurred background, to help reveal pattern noise. This is not artificial for real images; smooth tones such as sky, water, etc all have a propensity to show pattern noise. Or perhaps one just likes wide aperture landscapes.

There are three processing variations representing a reasonable RAW conversion for this scene:

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Variants RGB +2, Red Channel +2 available in full article
Canon 1D X + 85/1.2L, ISO 100, 1/3000 @ f/1.2
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