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Resolution Chart Comparison

Shots here are of our new 'version two' resolution chart which provides for measurement of resolution up to 4000 LPH (Lines Per Picture Height). A value of 20 equates to 2000 lines per picture height. 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 aperture priority (optimum aperture selected), image parameters default. Exposure compensation set to deliver approximately 80% luminance of white area.

Panasonic DMC-L1 (2,958 KB; 7.4 MP) Olympus E-330 (4,083 KB; 7.4 MP)
Canon EOS 30D (2,409 KB; 8.2 MP) Sony DSLR-A100 (2,213 KB; 10 MP)

Panasonic DMC-L1 Olympus E-330
Canon EOS 30D Sony DSLR-A100

Panasonic DMC-L1 Olympus E-330
Canon EOS 30D Sony DSLR-A100

Panasonic DMC-L1 Olympus E-330
Canon EOS 30D Sony DSLR-A100

Measurable findings (three measurements taken for each camera):

Camera Measurement
Absolute
resolution
Extinction
resolution
Panasonic DMC-L1 Horizontal LPH 1750  2100 
Vertical LPH 1600  2000 
Olympus E-330 Horiz LPH * 1700  * 2000 
Vert LPH * 1600  * 2000 
Canon EOS 30D Horizontal LPH 1850  2100 
Vertical LPH 1650  2100 
Sony DSLR-A100 Horizontal LPH 2200  2900 
Vertical LPH 1800  2800 

* Moire 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)

The same sensor as the E-330 but a slightly better result in the horizontal direction because of the L1's cleaner output (no moire and no sharpening artifacts). Of all of these cameras the L1 delivers the cleanest image although that has the downside of giving a slightly soft appearance to edge detail.

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