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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 +0.7 EV to +1.3 EV (depending on the camera).

Nikon D80 (2,769 KB; 10 MP) Canon EOS 400D (2,720 KB; 10 MP)
Sony Alpha DSLR-A100 (2,213 KB; 10 MP) Canon EOS 350D (2,418 KB; 8.2 MP)

Nikon D80 Canon EOS 400D
Sony Alpha DSLR-A100 Canon EOS 350D (8 MP)

Nikon D80 Canon EOS 400D
Sony Alpha DSLR-A100 Canon EOS 350D (8 MP)

Nikon D80 Canon EOS 400D
Sony Alpha DSLR-A100 Canon EOS 350D (8 MP)

Measurable findings (three measurements taken for each camera):

Camera Measurement
Absolute
resolution
Extinction
resolution
Nikon D80 Horizontal LPH 2200  2300 
Vertical LPH 1800  2300 
Canon EOS 400D Horizontal LPH 2200  2300 
Vertical LPH 1800  2300 
Sony Alpha DSLR-A100 Horizontal LPH 2200  2900 
Vertical LPH 1800  2800 
Canon EOS 350D Horizontal LPH 1850  2100 
Vertical LPH 1650  2100 

* 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 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)

As expected the D80 delivered the same 2200/1800 LPH performance we saw from the DSLR-A100, the only clear difference being that both the D80 and EOS 400D blur detail beyond 2300 LPH where as the DSLR-A100 appears to continue it, along with some moire. Is it a big step from eight megapixels? No, but then Nikon didn't do eight megapixels.

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