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.
The EOS 40D delivered exactly the same resolution as its smaller older ten megapixel sibling the EOS 400D, compared to the D200 there's not a huge amount of difference apart from noticeably less sharpening by default (as previously mentioned).