Dick Campbell
Veteran
sorry, didn't mean to talk down, but your question implied ...I know what time lapse is, I just wasn't sure when you would use Interval recording vs changing the frame rate. It sounds like they accomplish the same thing, but less than 2fps would be the cut-off where you would use interval over fps.
anyway, the choice (INTERVAL or Frame Rate) is based on what you want to accomplish, iow, how long is the actual event, and how long a clip do you want to show.
for example, a flower opening that takes four hours, and you want to show it in 10 seconds, means you need 300 (10 x 30) frames. So ,you would take one frame every 48 secs, requiring INTERVAL mode.