Previous page Next page

Resolution Chart Comparison (JPEG)

Shots here are of our '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.

Ricoh GXR/S10 24-72mm (3.3 MB, 10 MP) Canon G11 (1.6 MB, 10MP)
Panasonic LX3 (3.4 MB, 10 MP) Panasonic GF1 (4.3 MB, 12.3 MP)

Ricoh GXR/S10 24-72mm Canon G11
Panasonic LX3 Panasonic GF1

Ricoh GXR/S10 24-72mm Canon G11
Panasonic LX3 Panasonic GF1

Ricoh GXR/S10 24-72mm Canon G11
Panasonic LX3 Panasonic GF1

Measurable results

Camera Measurement
Absolute
resolution
Extinction
resolution
Ricoh GXR/S10 Horizontal LPH 2150  * 3000 
Vertical LPH 2150  * 2600 
Canon G11 Horizontal LPH 2000  2250 
Vertical LPH 2050  2400 
Panasonic LX3 Horizontal LPH 2150  2400 
Vertical LPH 2150  2500 
Panasonic GF1 Horizontal LPH 2250  2600 
Vertical LPH 2200  2550 

* 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)
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)

On high contrast scenes, such as our black and white resolution test chart, the S10 module does a much better job than in low contrast situations where its noise reduction tends to blur a lot of fine detail away. It produces not only a marginally higher absolute resolution than the Canon G11 but also manages to resolve some detail up to very high frequencies. There is some visible moire but all in all the Ricoh output is pretty clean. It's no surprise that the Micro Four Thirds Panasonic GF1 produces a slightly higher absolute resolution.

Previous page Next page
11
I own it
0
I want it
4
I had it
Discuss in the forums

Comments