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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.

Nikon D40X (2,762 KB, 10 MP) Canon EOS 400D (2,720 KB, 10 MP)
Olympus E-410 (5,530 KB; 10 MP) Nikon D40 (1,739 KB, 6 MP)

Nikon D40X Canon EOS 400D
Olympus E-410 Nikon D40 (6 MP)

Nikon D40X Canon EOS 400D
Olympus E-410 Nikon D40 (6 MP)

Nikon D40X Canon EOS 400D
Olympus E-410 Nikon D40 (6 MP)

Measurable results

Camera Measurement
Absolute
resolution
Extinction
resolution
Nikon D40X Horizontal LPH 2200  2300 
Vertical LPH 1800  2300 
Canon EOS 400D Horizontal LPH 2200  2300 
Vertical LPH 1800  2300 
Olympus E-410 Horizontal LPH * 2050  * 2300 
Vertical LPH * 1800  * 2300 
Nikon D40 Horizontal LPH * 1600  * 1850 
Vertical LPH 1550  1700 

* 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)

As expected the D40X delivers the exact same resolution as its more expensive 'prosumer' model the D80, indeed the resolution chart crops look virtually identical to that camera. This 2200/1800 LPH result also in line with the Canon EOS 400D and Sony Alpha DSLR-A100.

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