Resolution Chart Comparison
Shots here are of the PIMA/ISO 12233 standard resolution test chart (more of which are available in our comparison database). This resolution chart allows us to measure the actual performance of the lens and sensor system. It measures the ability of the camera to resolve lines at gradually higher resolutions and enables us to provide a definitive value for comparison purposes. Values on the chart are 1/100th lines per picture height. So a value of 15 equates to 1500 lines per picture height. For each camera the relevant 50 mm prime lens was used. The chart is shot at a full range of apertures and the sharpest image selected.
Studio light, cameras set to auto, all settings factory default. Aperture selected for optimum sharpness. Exposure compensation +0.7 EV to +1.3 EV.
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| Olympus E-300 |
Canon EOS 20D |
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| Canon EOS 300D |
Olympus C-8080 WZ |
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| Olympus E-300 |
Canon EOS 20D |
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 |
| Canon EOS 300D |
Olympus C-8080 WZ |
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| Olympus E-300 |
Canon EOS 20D |
 |
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| Canon EOS 300D |
Olympus C-8080 WZ |
 |
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| Olympus E-300 |
Canon EOS 20D |
 |
 |
| Canon EOS 300D |
Olympus C-8080 WZ |
Measurable findings (three measurements taken for each camera):
| Camera |
Measurement |
Absolute
resolution |
Extinction
resolution |
| Olympus E-300 |
Horiz LPH |
* 1800 |
* 1950 |
| Vert LPH |
* 1650 |
* 1950 |
| Canon EOS 20D |
Horiz LPH |
1850 |
+ 2000 |
| Vert LPH |
1650 |
+ 2000 |
| Canon EOS 300D |
Horiz LPH |
1600 |
1900 |
| Vert LPH |
1450 |
1850 |
| Olympus C-8080 WZ |
Horiz LPH |
1750 |
* 2000 |
| Vert LPH |
1650 |
* 1950 |
| * |
Moire is visible |
| + |
Chart maximum |
| LPH |
Lines per Picture Height (to allow for different aspect ratios the measurement is the same for horizontal and vertical) |
| 5° Diagonal |
Lines set at 5° diagonal |
| Absolute res. |
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 res. |
Detail beyond camera's definition (becomes aliased) |
| n/a |
Not Available (above the capability of the test chart) |
| n/v |
Not Visible (not visible on test results) |
The E-300 produced just slightly less resolution than the EOS 20D, although it appears mostly to do with image processing and perhaps the strength of the low-pass-filter used, the E-300 gets softer towards extinction quicker than the EOS 20D. The other main difference between the two was that the E-300 exhibits noticeable moire along the resolution bars from around the 1500 LPH mark. We know from our RAW software test that this is a result of the camera's image processing.
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