i appreciate the suggestion, ida! i guess i just really have a taste for low key

alpicat, unfortunately i don't think we can go any higher vertical than 1536 with the 5d3 at this time. i'd love to go higher but i don't think it could be done without some kind of sensor "overclocking" and that is not even on the radar...
so to get 16:9 you would have to reduce the horizontal resolution accordingly, resulting in 2906.