Three years after the last EOS-1Ds, the Mark II, the Mark III pushed digital SLR resolution over the twenty megapixel barrier with specifically twenty-one-point-one million pixels (5616 x 3744) on its 36 x 24 mm (full 35 mm frame) sensor.
Long summary description Canon EOS 1Ds Mark III 21 MP CMOS 5616 x 3744 pixels Black: Canon EOS 1Ds Mark III. Megapixel (approx.): 21 MP, Sensor type: CMOS, Maximum image resolution: 5616 x 3744 pixels. Optical zoom: 8x. Display diagonal: 7.62 cm (3"). PictBridge.
RK3M. 229 362 424 919 500 574 788 296

canon 1ds mark 3 specs