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Resolution Chart Comparison (RAW)

Shots here are of our 'version two' resolution chart which provides for measurement of resolution up to 4000 LPH (Lines Per Picture Height). A value of 20 equates to 2000 lines per picture height. For each camera the relevant prime lens was used. The chart is shot at a full range of apertures and the sharpest image selected. Studio light, cameras set to aperture priority (optimum aperture selected), image parameters default. Exposure compensation set to deliver approximately 80% luminance of white area.

For a (more) level playing field we also convert our resolution tests using Adobe Camera RAW. Because Adobe Camera RAW applies different levels of sharpening to different cameras (this confirmed) we had to use the following workflow for these conversions:

  • Load RAW file into Adobe Camera RAW (Auto mode disabled)
  • Set Sharpness to 0 (all other settings default)
  • Open file to Photoshop
  • Apply a Unsharp mask: 80%, Radius 1.0, Threshold 0
  • Save as a TIFF (for cropping) and as a JPEG quality 11 for download
Ricoh GXR/S10 24-72mm (2.4 MB, 10 MP) Canon G11 (2.3 MB; 10 MP)
Panasonic LX3 (2.2 MB, 10 MP) Panasonic GF1 (2.9MB, 12.0 MP)

Ricoh GXR/S10 24-72mm Canon G11
Panasonic LX3 Panasonic GF1

Ricoh GXR/S10 24-72mm Canon G11
Panasonic LX3 Panasonic GF1

Ricoh GXR/S10 24-72mm Canon G11
Panasonic LX3 Panasonic GF1

Measurable results

Camera Measurement
Absolute
resolution
Extinction
resolution
Ricoh GXR/S10 24-72mm Horizontal LPH 2200  * 3400 
Vertical LPH 2200  * 3400 
Canon G11 Horizontal LPH 1950  * 2250 
Vertical LPH 2000  * 2450 
Panasonic LX3 Horizontal LPH 1900  * 2400 
Vertical LPH 1850  * 3200 
Panasonic GF1 Horizontal LPH 2450  3500 
Vertical LPH 2400  3500 

* Moiré is visible
+ Chart maximum
LPH Lines per Picture Height (to allow for different aspect ratios the measurement is the same for horizontal and vertical)
Absolute resolution Point at which all lines of a resolution bar are still visible and defined, beyond this resolution loss of detail occurs (below Nyquist frequency).
Extinction resolution Detail beyond camera's definition (becomes aliased)

When using our standard RAW workflow on the S10 files the measured absolute resolution increases very slightly and outperforms the Canon G11 and LX3. It cannot compete with the large sensor GF1 but there is still some detail up to very high frequencies. There are is a lot of moire and other artifacts visible in the image but this is not much of an issue for real-life shots.

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