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-G1 (5.5 MB; 12 MP) Olympus E-520 (5.5 MB; 10 MP)
Sony DSLR-A350 (3.1 MB, 14 MP) Canon EOS 450D (2.6 MB, 12.2 MP)

Panasonic DMC-G1 Olympus E-520
Sony DSLR-A350 Canon EOS 450D

Panasonic DMC-G1 Olympus E-520
Sony DSLR-A350 Canon EOS 450D

Panasonic DMC-G1 Olympus E-520
Sony DSLR-A350 Canon EOS 450D

Measurable results

Camera Measurement
Panasonic DMC-G1 Horizontal LPH 2350  2700 
Vertical LPH 2300  2550 
Olympus E-520 Horizontal LPH * 2050  * 2300 
Vertical LPH * 2050  * 2300 
Sony DSLR-A350 Horizontal LPH 2300  2700 
Vertical LPH 2200  2500 
Canon EOS 450D Horizontal LPH 2300  * 2500 
Vertical LPH 2200  * 2500 

* 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)
Absolute resolution 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 resolution Detail beyond camera's definition (becomes aliased)

The G1 shows an excellent performance in this area and does very well indeed against the competition in this comparison of which some have a higher nominal resolution. The Panasonic's absolute resolution is a tad higher than even the Canon EOS450D's which is one of the highest resolving cameras in this class and the G1 still shows at least some detail up to very high frequencies. This is nothing short of impressive.