Sony DSC-P5 Review
Compared to... (contd.)
Now we'll compare the DSC-P5 to a few other cameras from our test archives. Here we're comparing colour and resolution to the Sony DSC-P1, Nikon Coolpix 880 and Kyocera Finecam S3.
Colour Chart Comparison
Colour charts are shot in daylight, Auto White Balance, EV compensation +0.3 (all cameras), measured light ~10 EV. This test is also dependent on the accuracy of the camera's auto white balance, the colour charts are shot in daylight but some camera's white balance is better than others. All cameras are given 20 seconds to "settle" before the shot is taken.
|Sony DSC-P5||Sony DSC-P1|
|Nikon Coolpix 880||Kyocera Finecam S3|
In the table below we're only measuring colour. The RGB values were measured from a VGA reduced image (to average colours, remove noise and eliminate JPEG artifacts) using the Eyedropper tool in Photoshop with a 5 by 5 Average Sample Size.
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.
|Horizontal resolution||Vertical resolution||5 degree diagonal res.|
|Nikon Coolpix 880|
|Kyocera Finecam S3|
Measurable findings (three measurements taken for each camera):
|Camera||Measurement||Absolute Res.||Extinction Res.|
|Sony DSC-P5||Horiz LPH||1000||1350|
|5o Diagonal LPH||1000||n/a|
|Sony DSC-P1||Horiz LPH||1000||1350|
|5o Diagonal LPH||1000||n/a|
|Nikon Coolpix 880||Horiz LPH||900||1300|
|5o Diagonal LPH||900||n/a|
|Kyocera Finecam S3||Horiz LPH||820||1100|
|5o Diagonal LPH||800||1000|
* Moiré is visible
Definition of terms:
|LPH||Lines per Picture Height (to allow for different aspect ratios the measurement is the same for horizontal and vertical)|
|5o Diagonal||Lines set at 5o 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)|
image detail. Beyond the Nyquist frequency aliasing occurs.
Unsurprisingly identical results to the DSC-P1, luckily we were close enough to the resolution chart not to need to use the telephoto end of zoom as that would almost definetly have had a detrimental effect on resolution (see my comments earlier in the review). Resolution measures up well to the competition.