Resolution Chart Comparison
Shots here are of our new '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 +0.7 EV to +1.3 EV.
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| Canon EOS 30D |
Nikon D200 |
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| Canon EOS 5D |
Canon EOS 20D |
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| Canon EOS 30D |
Nikon D200 |
 |
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| Canon EOS 5D |
Canon EOS 20D |
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| Canon EOS 30D |
Nikon D200 |
 |
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| Canon EOS 5D |
Canon EOS 20D |
Measurable findings (three measurements taken for each camera):
| Camera |
Measurement |
Absolute
resolution |
Extinction
resolution |
| Canon EOS 30D |
Horizontal LPH |
1850 |
2100 |
| Vertical LPH |
1650 |
2100 |
| Nikon D200 |
Horizontal LPH |
2100 |
2250 |
| Vertical LPH |
1700 |
2200 |
| Canon EOS 5D |
Horizontal LPH |
2300 |
2500 |
| Vertical LPH |
2000 |
2500 |
| Canon EOS 20D |
Horizontal LPH |
1850 |
2100 |
| Vertical LPH |
1650 |
2100 |
| * |
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) |
No surprises, the same sensor, the same image processor and we get exactly the same results, the same absolute and extinction resolution and even the same 'type' of moire effect. As we noted previously the jump from eight to ten megapixels doesn't account for a huge leap of resolution, eight to (almost) thirteen does.
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