This might help…
Don’t get the different shooting formats (720p/24p, 720p/24pN, 720p/60p, etc.) confused for the Variable Frame Rates which work best in conjunction with the Native Recording Formats (720p/24pN, 720p/30pN). Using the 720p/24pN format with a 60fps framerate, for example, will yeild incredible slo-mo (more than 2x slower) when edited on a 24fps timeline.
The key is to understand the dif. between Recording Format/Setup (i.e. 720p/24pN) and the Frame Rate, which you change in the “Scene File” menu on the camera and not the “Recording Setup” menu.
Hope that helps. I went through the same confusion….
Mike
CuseoMovingMedia
Aspen, CO, U.S.A.
http://www.aspenfreeride.com