The Joy of Pixel Density

Started Jul 13, 2008 | Discussions thread
DSPographer Senior Member • Posts: 2,464
400D Dynamic range not sensor limited

The shadow noise in the 400D at 100 ISO is determined by the circuitry downstream of the large sensor pixels. This is shown by how much lower the absolute noise is at 1600 ISO. The shadow noise at 100 ISO is also only relevant in terms of a high dynamic range image. For an image with room to increase ISO gain without clipping problems the 400D image should have been shot at a higher ISO setting. So you are comparing small to large pixels using a measurement of the noise from the circuitry downstream of the pixels for images that are improperly exposed at the wrong ISO.

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