To help you with the calculations, you can download the $4.99 Timelapse Calculator iPhone app. Fill in the information you have—event duration, FPS, wait time, or clip length—and the app will help you figure out the rest.
Get the Set Up Right
It's important that the camera's batteries are fully charged and that you have a large enough memory card to hold the large number of photos. You don’t need to shoot RAW or even very high-resolution photos when creating a time-lapse movie, so go into your settings and bump down the file size.
To create a feeling of movement in your film, experiment with longer exposure times—a small amount of blur in an image can minimize jarring transitions between frames. Set all of your camera settings to Manual, including the focus, and mount your camera on a tripod in a location where it won’t be bumped, shaken, or knocked over. Take a few test photos to get the best shutter speed and aperture settings, then start your shoot.
If your camera doesn’t automatically assemble your photos into a time-lapse movie, you can use QuickTime Pro (QuickTime X doesn’t have this feature). If you've upgraded to Snow Leopard, you can still use QuickTime Pro by installing QuickTime 7 from your Snow Leopard install DVD. For more information see this Apple support article. Another application that has time-lapse features is the $49 iStopMotion2 from Boinx Software.
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