Sony DSC-F717 Review
Here we can compare, using results from our review archives, the colour reproduction and resolution of the Sony DSC-F717 to three other five megapixel digital cameras: Minolta DiMAGE 7Hi, Nikon Coolpix 5700 and Olympus E-20.
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-F717||Minolta DiMAGE 7Hi|
|Nikon Coolpix 5700||Olympus E-20|
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.
Comparing the DSC-F717's colours to other cameras here it's clear that Sony has made some considerable changes to the colour balance of the F717 versus the F707. Colours are more accurate and less saturated but still well balanced and strong enough to give good response.
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 aperture priority, all
settings factory default.
Exposure compensation +0.7 EV for all cameras.
|Horizontal resolution||Vertical resolution||5 degree diagonal res.|
|Minolta DiMAGE 7Hi|
|Nikon Coolpix 5700|
Measurable findings (three measurements taken for each camera):
|Camera||Measurement||Absolute Res.||Extinction Res.|
|Sony DSC-F717||Horiz LPH||1450||1800|
|5° Diagonal LPH||+ 1000||-|
|Minolta DiMAGE 7Hi||Horiz LPH||* 1300||* 1450|
|Vert LPH||* 1150||* 1450|
|5° Diagonal LPH||900||-|
|Nikon Coolpix 5700||Horiz LPH||1350||* 1500|
|Vert LPH||* 1200||1500|
|5° Diagonal LPH||+ 1000||-|
|Olympus E-20||Horiz LPH||* 1350||* 1650|
|Vert LPH||* 1300||* 1650|
|5° Diagonal LPH||+ 1000||-|
* Moiré becomes visible, + Chart maximum
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)|
image detail. Beyond the Nyquist frequency aliasing occurs.
Unsurprisingly the DSC-F717 delivers the exact same resolution as its older sibling the DSC-F707. A year on it's still enough to crown the DSC-F717 king of resolution at the five megapixel level.
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