Resolution Chart Comparison
Comparison cameras:
- Kodak DX7590 (5 MP, 10x zoom)
- Panasonic DMC-FZ20 (5 MP, 12x zoom)
- Canon PowerShot S60 (5 mp, 4x zoom)
- Nikon Coolpix 4800 (4 MP, 8.3x zoom)
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. Thus a value of 15 equates to 1500 lines per picture
height.
Studio light, cameras set to auto, settings all factory
default. If possible aperture was selected for optimum sharpness. Exposure compensation
+0.7 EV to +1.3 EV.
Resolution Chart crops
|
|
| Kodak DX7590 |
Panasonic DMC-FZ20 |
|
|
| Canon PowerShot S60 |
Nikon Coolpix 4800 |
 |
 |
 |
| Kodak DX7590 |
Panasonic DMC-FZ20 |
 |
 |
| Canon PowerShot S60 |
Nikon Coolpix 4800 |
Measurable findings
| Camera |
Measurement |
Absolute
resolution |
Extinction
resolution |
| Kodak DX7590 |
Horizontal LPH |
1100 |
*1400 |
| Vertical LPH |
1200 |
*1450 |
| 5° Diagonal LPH |
+1000 |
n/a |
| Panasonic DMC-FZ20 |
Horizontal LPH |
1350 |
1650 |
| Vertical LPH |
1300 |
1600 |
| 5° Diagonal LPH |
+1000 |
n/a |
| Canon PowerShot S60 |
Horiz LPH |
1450 |
* 1650 |
| Vert LPH |
1350 |
* 1700 |
| 5° Diagonal LPH |
+ 1000 |
n/a |
| Nikon Coolpix 4800 |
Horiz LPH |
*1200 |
*1450 |
| Vert LPH |
*1250 |
*1500 |
| 5° Diagonal LPH |
+1000 |
n/a |
| * |
Moiré 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) |
In terms of pure resolution the DX7590 is towards the lower end of the 5MP scale, though the images are clean and artefact-free.
|
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