[citation][nom]razor512[/nom]improvements to video also improve stills, eg increasing the SNR is great for high ISO video and photos, though for me, since I don't take pictures of animals, (mostly still objects) I use the lowest ISO 90% of the time since no matter how good the camera is, a lower ISO offers less noise.The 30 minute limit is a software limit and a firmware mod can remove it. Though the reason the limit is there is when the CMOS sensor is running at close to it's full bit rate, it gets very hot, and unlike a camera such as a RED epic, the heatsink on the canon 5d (not sure about the newest one), is basically a hunk of metal with no fins, While on a full on video camera, you have the equivalent of a laptop CPU heatsink on the CMOS sensor.eg here is the heatsink on a RED camera
http/www.extremetech.com/wp-cont [...] atsink.jpgI wonder if it is possible to mod the camera to have a better heatsink, or probably an external one if you want to completely dedicate it to video.[/citation]