Just testing out the MagicLantern raw build. This is shot in 1880x1050. That's the max resolution that the 5D2 can handle, so you can see how a little smaller it is to 1920x1080. It's not noticeably smaller and if upscaled, it still looks better than 1080p H.264. These 39 seconds equaled to 3.3 GB.
Canon 5D Mark II
Nikkor 55mm f/2.8 Micro