As expected, the camera offered excellent performance at all of the native settings -- as you can see from the image above, there's some noise noticeable when viewing an image at full size, though considering the camera's top resolution of 22.3 megapixels, we hardly see ISO 25,600 being an issue. Jumping beyond the top native range did yield significant noise, but assuming you're shooting for the web, even these settings are usable. Chances are, you won't often be examining images at a 1:1 pixel view, so jump past the break to see how each of the four frames represented above will look when scaled to a web-friendly 600-pixels-wide resolution, then hit up our source link to grab full-res JPEGs of each image captured during the shoot.
ISO 800 -- f/8 -- 1/12 sec. exposure
ISO 25,600 -- f/8 -- 1/400 sec. exposure
ISO 51,200 -- f/8 -- 1/800 sec. exposure
ISO 102,400 -- f/8 -- 1/1600 sec. exposure
Canon EOS 5D Mark III