Resolution Chart Comparison

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.

Nikon D700 (3.2 KB; 12 MP)	Sony DSLR-A900 (5.3 MB, 24.6 MP)
Canon EOS 5D (3.5 MB; 12.8 MP)	Nikon D300 (3.3 MB; 12 MP)

Nikon D700	Sony DSLR-A900
Canon EOS 5D	Nikon D300

Nikon D700	Sony DSLR-A900
Canon EOS 5D	Nikon D300

Nikon D700	Sony DSLR-A900
Canon EOS 5D	Nikon D300

Measurable results

The measured resolutions of all 12 megapixel cameras in this comparison are unsurprisingly in the same ballpark. The main differences are down to sensor design (anti-aliasing filter) and JPEG processing. The D700's rather conservative sharpening means the Canon EOS 5D's output looks a little sharper but the difference in measured resolution is marginal.

Naturally the 24 MP Sony DSLR-A900 stands out in this test, offering considerably more resolution than its 12 megapixel competitors. The resolved detail is quite simply staggering.