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As part of our image quality testing for the Pentax Optio RS1500, we've shot our resolution chart.
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 Pentax Optio RS1500 is capable of resolving up to around 22 (line widths per picture height x100) in its highest quality JPEG files.
Examining images of the chart taken at each sensitivity setting reveals the following resolution scores in line widths per picture height x100:
ISO 100, score: 22 (see full image)
ISO 200, score: 20 (see full image)
ISO 400, score: 20 (see full image)
ISO 800, score: 18 (see full image)
ISO 1600, score: 18 (see full image)
ISO 3200, score: 8 (see full image)
ISO 6400, score: 8 (see full image)
