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 (depending on the camera).
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| Nikon D80 |
Canon EOS 400D |
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| Sony Alpha DSLR-A100 |
Canon EOS 350D (8 MP) |
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| Nikon D80 |
Canon EOS 400D |
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| Sony Alpha DSLR-A100 |
Canon EOS 350D (8 MP) |
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| Nikon D80 |
Canon EOS 400D |
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| Sony Alpha DSLR-A100 |
Canon EOS 350D (8 MP) |
Measurable findings (three measurements taken for each camera):
| Camera |
Measurement |
Absolute
resolution |
Extinction
resolution |
| Nikon D80 |
Horizontal LPH |
2200 |
2300 |
| Vertical LPH |
1800 |
2300 |
| Canon EOS 400D |
Horizontal LPH |
2200 |
2300 |
| Vertical LPH |
1800 |
2300 |
| Sony Alpha DSLR-A100 |
Horizontal LPH |
2200 |
2900 |
| Vertical LPH |
1800 |
2800 |
| Canon EOS 350D |
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) |
| 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) |
As expected the D80 delivered the same 2200/1800 LPH performance we saw from the DSLR-A100, the only clear difference being that both the D80 and EOS 400D blur detail beyond 2300 LPH where as the DSLR-A100 appears to continue it, along with some moire. Is it a big step from eight megapixels? No, but then Nikon didn't do eight megapixels.
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