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Resolution Chart Comparison

Comparison cameras:

  • Canon PowerShot SD450 (5 MP, 3x zoom)
  • Panasonic DMC-FX7 (5 MP, 3x zoom)
  • Nikon Coolpix 5200 (5 MP, 3x zoom)
  • Pentax Optio S5i (5 MP, 3x zoom)

Shots here are of our standard resolution chart (version one or two). This 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 15 equates to 1500 lines per picture height. (Note that on version two of our chart the vertical resolution 1000 - 2000 lines have been horizontally flipped but are otherwise identical). For each camera the relevant prime lens was used. The chart is shot at a full range of apertures and the sharpest image selected.

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.

Canon PowerShot SD450 (1,808 KB; 5 MP) Panasonic DMC-FX7 (1,676 KB; 5 MP)
Nikon Coolpix 5200 (1,546 KB; 5 MP) Pentax Optio S5i (2,855 KB; 5 MP)

Resolution Chart crops

Canon PowerShot SD450 Nikon Coolpix 5200
Pentax Optio S5i Panasonic DMC-FX7
Canon PowerShot SD450 Nikon Coolpix 5200
Pentax Optio S5i Panasonic DMC-FX7

Measurable findings

Camera Measurement
Absolute
resolution
Extinction
resolution
Canon PowerShot SD450 (Ixus 55) Horizontal LPH 1400 1600
Vertical LPH *1400 *1750
5° Diagonal LPH +1000 n/a
Panasonic DMC-FX7 Horizontal LPH 1450 1700
Vertical LPH 1400 1600
5° Diagonal LPH +1000 n/a
Pentax Optio S5i Horizontal LPH *1250 *1500
Vertical LPH *1200 *1450
5° Diagonal LPH *+1000 n/a
Nikon Coolpix 5200 Horizontal LPH 1400   *1650
Vertical LPH 1350   *1650
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)

No surprises here - the SD450, like the SD400 before it, offers slightly higher than average resolution for a camera in this class, though there's not a lot in it. They're not the cleanest results here - there is some moiré visible at higher frequencies and high frequency diagonals are slightly jagged, but there's plenty of detail being captured and the results are as good as we can expect from this sensor and lens combination.

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