Compared to... five 8mp's and a D-SLR
Resolution 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. 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. So a value of 8 equates to 800 lines per picture height.
Studio light, cameras set to auto, all settings factory
default. Exposure compensation +0.7 EV for all cameras (to compensate for
the white background). Click on the camera name below the crops to download
the full resolution chart (large JPEG's).
 |
 |
| Nikon Coolpix 8700 |
Canon PowerShot Pro1 |
 |
 |
| Sony DSC-F828 |
Olympus C-8080 Wide Zoom |
 |
 |
| Konica Minolta DiMAGE A2 |
Canon EOS-300D |
 |
 |
| Nikon Coolpix 8700 |
Canon PowerShot Pro1 |
 |
 |
| Sony DSC-F828 |
Olympus C-8080 Wide Zoom |
 |
 |
| Konica Minolta DiMAGE A2 |
Canon EOS-300D |
 |
 |
| Nikon Coolpix 8700 |
Canon PowerShot Pro1 |
 |
 |
| Sony DSC-F828 |
Olympus C-8080 Wide Zoom |
 |
 |
| Konica Minolta DiMAGE A2 |
Canon EOS-300D |
Measurable findings (three measurements taken for each camera)
| Camera |
Measurement |
Absolute
Res. |
Extinction
Res. |
| Nikon
Coolpix 8700 |
Horizontal LPH |
1600 |
* 1900 |
| Vertical LPH |
1500 |
1850 |
| 5° Diagonal LPH |
+ 1000 |
n/a |
| Canon
PowerShot Pro1 |
Horizontal LPH |
1700 |
1950 |
| Vertical LPH |
1650 |
* 1950 |
| 5° Diagonal LPH |
#+ 1000 |
n/a |
| Sony DSC-F828
|
Horizontal LPH |
1650 |
* 1950 |
| Vertical LPH |
1550 |
1950 |
| 5° Diagonal LPH |
+ 1000 |
n/a |
| Olympus
C-8080 WZ |
Horizontal LPH |
1750 |
* 2000 |
| Vertical LPH |
1650 |
* 1950 |
| 5° Diagonal LPH |
+ 1000 |
n/a |
| Konica
Minolta A2 |
Horizontal LPH |
1600 |
* 1850 |
| Vertical LPH |
* 1400 |
* 1800 |
| 5° Diagonal LPH |
#+ 1000 |
n/a |
| Canon
EOS-300D |
Horizontal LPH |
1600 |
1900 |
| Vertical LPH |
1450 |
1850 |
| 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 CCD can still faithfully record
image detail. Beyond the Nyquist frequency aliasing occurs.
In joint first place come the Olympus C-8080 Wide Zoom and
Canon PowerShot Pro1 delivering a mighty impressive 1700 - 1750 LPH (almost in both
directions), visually the C-8080 may just have the edge over the Pro1 (the Olympus
has the best lens here). In second place the Sony DSC-F828 which although measuring
slightly lower resolution in all practicality would be just as sharp and detailed
as the Canon and Olympus. In third place the Nikon Coolpix 8700, it's older
lens clearly not capable of delivering quite enough resolution back to the sensor
to achieve the best result here. In last place and as we had expected the Konica
Minolta A2 whose lens and image processing let it down, especially for vertical
resolution where the resolution chart picked up a lot of moire artifacts and
limited resolution.
What is interesting from this comparison is that only the Canon,
Olympus and Sony showed any resolution advantage over the six megapixel Canon
EOS 300D. That said the EOS 300D's image has that less processed, cleaner appearance
we associate with large sensor digital SLR's.
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