I've got interested in CHDK and tomorrow I'll get my SX40 camera.
I want to play around with movie modes. These modes are available for SX40:
1) 320x240 at 240fps
2) 640x480 at 120fps
3) 1280x720 at 30fps
4) 1920x1080 at 27fps
I'm really confused, why is there no "1280x720 at 120 fps" or "1280x720 at 60 fps" available?
As far as I know SX40 have the DIGIC5 processor, which is approximately 5 times faster, than DIGIC4 processor. "1280x720 at 30fps" was available to DIGIC4 cameras. So by a common sense SX40 should be able to record at least at "1280x720 at 60 fps".
So is it a firmware limitation, or a problem with something else(e.g. memory consumption)?
What I've read on this forum so far made me think, that camera requires memory for number of uncompressed frames of 1 sec. of movie while recording. Am I correct at that?