Here is a very quick test comparing the new Canon 5D Mark III vs. the Canon 5D Mark II from Vimeo user Saika. The test footage from the 5D3 was shot at 12800 ISO. There is significantly less noise in the 5D3 footage. Now that the camera is out in the wild we should see more video comparisons. Here is a rip from the post translated from Japanese to English.
“Photography was used to 5 EOS D Mark III is beta-machine. WEB up due to the re-compression is at the original image quality and is different. vimeo is a beautiful, but I did not seen in iPhone? YouTube version is here. I like the night-vision camera high-sensitivity? It may be that I’m very, very important items. If the ultra-high-sensitivity range (in general) under the High-sensitivity of the area to better image quality. This sample, the other sensitivity in the long version, including a comparison, will be screened at the event. 3 / 9 of the Tokyo venue only. From the evening session.”