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Resolution Chart Comparison

Comparison cameras:

  • Kodak EasyShare Z650 (6MP, 10x zoom)
  • Panasonic DMC-FZ7 (6 MP, 12 x zoom)
  • Olympus SP-500UZ (6 MP, 10x zoom)
  • Canon PowerShot S2 IS (5 MP, 12x 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.

Kodak Z650 (924 KB; 6 MP) Canon S2 IS (1,896 KB; 5 MP)
Panasonic DMC-FZ7 (2,365 KB; 6 MP) Olympus SP-500UZ (3,305 KB; 6 MP)

Resolution Chart Crops

kodak EasyShare Z650 Olympus SP-500UZ
Panasonic DMC-FZ7 Canon S2 IS
Kodak EasyShare Z650 Olympus SP-500UZ
Panasonic DMC-FZ7 Canon S2 IS

Measurable findings

Camera Measurement
Absolute
resolution
Extinction
resolution
Kodak EasyShare Z650 Horizontal LPH 1350 *1650
Vertical LPH 1350 *1650
5° Diagonal LPH +1000 n/a
Canon PowerShot S2 IS Horizontal LPH 1350 ‡ * 1550 ‡
Vertical LPH * 1500 ‡ * 1650 ‡
5° Diagonal LPH +1000 ‡ n/a
Olympus SP-500UZ Horizontal LPH 1250 1500
Vertical LPH 1300 1550
5° Diagonal LPH +1000 n/a
Panasonic DMC-FZ7 Horizontal LPH 1400 *1800
Vertical LPH 1500 *1850
5° Diagonal LPH +1000 n/a

* Moiré is visible
+ Chart maximum
Jagged diagonals
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)

The Z650 is definitely capable of resolving more detail than the 5MP Z740 that preceded it - and is in fact slightly above average for a 'budget' camera in this class. They're not the cleanest results - the default sharpening is too high (you can see fairly strong halos) and there is mild moiré at the highest frequencies, but there's no denying that this is doing a better job with very fine detail than any of its 'big zoom' EasyShare predecessors - including the 'pro level' P850.

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