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As part of our image quality testing for the Canon EOS 7D, we've shot our resolution chart with the Sigma f/1.4 50mm lens mounted.
If you view our crops of the resolution chart's central section at 100% (or Actual Pixels) you will see that, for example, at ISO 100 the Canon EOS 7D is capable of resolving up to around 24 (line widths per picture height x100) in its highest quality JPEG files.
For a full explanation of what our resolution charts mean, and how to read them please click here to read the full article.
Examining images of the chart taken at each sensitivity setting reveals the following resolution scores in line widths per picture height x100:
JPEG images
ISO 100, score: 24 (see full image)
ISO 200, score: 24 (see full image)
ISO 400, score: 24 (see full image)
ISO 800, score: 22 (see full image)
ISO 1600, score: 22 (see full image)
ISO 3200, score: 22 (see full image)
ISO 6400, score: 20 (see full image)
Raw images
ISO 100, score: 28 (see full image)
ISO 200, score: 28 (see full image)
ISO 400, score: 26 (see full image)
ISO 800, score: 26 (see full image)
ISO 1600, score: 24 (see full image)
ISO 3200, score: 24 (see full image)
ISO 6400, score: 24 (see full image)
