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As part of our image quality testing for the Pentax K-S1, we've shot our resolution chart.

Click here to see a full explanation of what our resolution charts mean.

Examining images of the chart taken at each sensitivity setting reveals the following resolution scores in line widths per picture height x100:

Pentax K-S1 resolution chart

Full ISO 100 image. See 100% crops below:

JPEG

Pentax K-S1 resolution chart

ISO 100: 24. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 200: 24. Click here for full resolution image.

Pentax K-S1 resolution chart

ISO 400: 22. Click here for full resolution image.

Pentax K-S1 resolution chart

ISO 800: 24. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 1600: 24. Click here for full resolution image.

Pentax K-S1 resolution chart

ISO 3200: 22. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 6400: 22. Click here for full resolution image.

Pentax K-S1 resolution chart

ISO 12800: 16. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 25600: 14. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 51200: 12. Click here for full resolution version.

RAW (converted to TIFF)

Pentax K-S1 resolution chart

ISO 100: 28. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 200: 28. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 400: 28. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 800: 28. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 1600: 28. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 3200: 26. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 6400: 24. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 12800: 20. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 25600: 16. Click here for full resolution version.

Pentax K-S1 resolution chart

ISO 51200: 14. Click here for full resolution version.