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. Studio light (continuous), cameras set to auto, all settings factory default. Aperture selected for optimum sharpness. Exposure compensation +0.7 EV to +1.3 EV.
Beyond our chart, but not beyond our means
The standard PIMA/ISO resolution chart is capable of measuring the resolution of standard Bayer sensor digital cameras up to approximately ten megapixels, beyond that we must be a little more creative. To compare the resolution of the SLR/c and EOS-1Ds we shoot the resolution chart from twice the normal distance and end up with a chart exactly half it's normal size (2250 x 1500 for the SLR/c, 2032 x 1352 for the EOS-1Ds). This allows us to measure resolution up to 4000 LPH. When reading the crops below values on the chart now represent 1/200 lines per picture height. So a value of 15 equates to 3000 lines per picture height. It's worth noting that the EOS-1Ds resolution chart was shot with a sharpening setting of 0 (factory default).
 |
 |
| Kodak
DCS Pro SLR/c (2250 x 1500 cropped, 654 KB) |
Canon
EOS-1Ds (2032 x 1352 cropped, 482 KB) |
Crops from half-size chart
Important: the crops below are taken from a standard resolution chart shot from twice the standard distance, hence measured resolution is double that indicated (10= 2000 LPH).
 |
| Kodak DSC Pro SLR/c |
 |
| Canon EOS-1Ds |
 |
 |
| Kodak DSC Pro SLR/c | Canon EOS-1Ds |
 |
 |
| Kodak DSC Pro SLR/c | Canon EOS-1Ds |
 |
 |
| Kodak DSC Pro SLR/c | Canon EOS-1Ds |
Measurable findings (three measurements taken for each camera):
| Camera | Measurement | Absolute Res. | Extinction Res. |
| Kodak DCS Pro SLR/c | Horiz LPH | 2400 | * 2700 |
| Vert LPH | 2200 | * 2700 | |
| 5° Diagonal LPH | 2000 | n/a | |
| Canon EOS-1Ds | Horiz LPH | 2400 | * 2600 |
| Vert LPH | 2000 | * 2600 | |
| 5° Diagonal LPH | 2000 | n/a | |
| Canon EOS-10D | Horiz LPH | 1600 | 1900 |
| Vert LPH | 1450 | 1850 | |
| 5° Diagonal LPH | 1000 | n/a | |
| Fujifilm
S2 Pro (12 mp size) |
Horiz LPH | 1800 | 2000 |
| Vert LPH | 1700 | 2000 | |
| 5° Diagonal LPH | 1000 | n/a |
* Moiré is visible, + Chart maximum, # Jagged diagonals
Definition of terms:
| 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 Resolution | Still defined detail (below Nyquist frequency*) |
| Extinction Resolution | Detail beyond camera's definition (becomes a solid gray alias) |
| n/a | Not Available (above the capability of the test chart) |
| n/v | Not Visible (not visible on test results) |
* Nyquist frequency defined as the
highest spatial frequency where the sensor can
still faithfully record image detail. Beyond the Nyquist frequency aliasing
occurs
The SLR/c puts in a slightly lower resolution performance than the 14n, this could be explained by the redesigned sensor and absorption filter used. Horizontal resolution is virtually the same as the EOS-1Ds, vertical resolution is slightly higher but in both cases the SLR/c exhibits strong color moiré at extinction.
