"Probably the most notable change however is the newly developed 8.2 megapixel sensor that delivers images up to 3,504 x 2,336 pixels in size, in the same 3:2 aspect ratio as conventional 35mm film. As you can see from the image below the 20D offers a significant increase in sensor resolution compared to the 3.1 megapixel EOS D30, although the improvement relative to the D60 and 10D is rather more modest. At the end of the day however, owners of the 20D will have more pixels to play with when post-processing and cropping images, which for some will be a major advantage."