Originally posted by jimr-pdx I believe the K-7 also stops at 720, whether by conspiracy or a buffering bottleneck I couldn't say. I've found 720 to be more than enough but of course your needs will be different. As to video hacks, I know those who hacked the micro43 cameras were examining the K-01 with interest, but I never heard any results of their investigations.
Here's a link into that world.
I have to agree here, I believe it is a buffer bottleneck. Same reason why the k-x can only shoot so many raw on high continuous. Also, the k-5 shoots 25fps, while the k-x does 24, which is more of a regional difference. I'm not exactly versed on the still sensor size to video capture dynamics, but I feel that that could also be a bottleneck.
All that said, I've shot many short films with my k-x, and every time the person I shot for was more than impressed with the quality. The real bottleneck that keeps the k-x from being a video shooter is the fact that it does not have manual controls for shutter/Iso. You have to use exposure lock which becomes quite annoying. The sensor also overheats very quickly, which becomes a problem for longer shoots. (Tip for longer shoots, whenever not in use/recording, turn camera off, open and take out your memory card and batteries, leave the doors open as the body cools down and the batteries/card cool down too. If you have the option, swap cards/batteries with cool ones to keep the system happy, just keep alternating.)