Setup for time-lapse. Bloom shown is in the clay pot in the center of the frame.
Time-lapse of blooming cactus flower: YouTube-HD, 52meg file
Filming started at 12:00 and ended at 16:30. 1556 total images were taken at 10 s intervals.
Stapelia Bloom time-lapse. Images were captured at 5 min intervals.
Frame rate equal to 30 per min.