Those are nearly full-sensor images. If you download the supplemental materials, the large images are all 3492 x 2205. That's 7.7 megapixels -- and the Canon

Those are nearly full-sensor images. If you download the supplemental materials, the large images are all 3492 x 2205. That's 7.7 megapixels -- and the Canon 40D is listed as a 10.1 megapixel-camera. They shot the photos with a hand-made, one-element lens. This is a very bad lens. The photos may look like they're out-of-focus, but they're actually in-focus. (The width of lines does not change after the processing.) They just have an extreme amount of diffusion, chromatic aberration, and all sorts of other distortions.