Resolution Chart Comparison
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.
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| Canon EOS 40D |
Nikon D200 |
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| Pentax K10D |
Canon EOS 30D (8 MP) |
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| Canon EOS 40D |
Nikon D200 |
 |
 |
| Pentax K10D |
Canon EOS 30D (8 MP) |
 |
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| Canon EOS 40D |
Nikon D200 |
 |
 |
| Pentax K10D |
Canon EOS 30D (8 MP) |
Measurable results
| Camera |
Measurement |
Absolute
resolution |
Extinction
resolution |
| Canon EOS 40D |
Horizontal LPH |
2100 |
2300 |
| Vertical LPH |
1800 |
2300 |
| Nikon D200 |
Horizontal LPH |
2100 |
2250 |
| Vertical LPH |
1700 |
2200 |
| Pentax K10D |
Horizontal LPH |
* 2000 |
* 2300 |
| Vertical LPH |
1800 |
* 2500 |
| Canon EOS 30D |
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 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) |
The EOS 40D delivered exactly the same resolution as its smaller older ten megapixel sibling the EOS 400D, compared to the D200 there's not a huge amount of difference apart from noticeably less sharpening by default (as previously mentioned).
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