If there is no motion on the miniature, it can be photographed at any speed. Water, fire, explosions, and falling effects are usually done with large models and camera speeds up to 360 fps. The exact speed depends upon the scale of the model and the effect desired. The accompanying chart is a starting point, but for the best results, tests should be made (page 423).
High-speed shots can often be expensive and unpredictable events because of the uncertainty of required camera speeds, pyrotechnics, winds, mechanical equipment, human error, and the need to sequence events in much faster succession than they will be viewed. If an explosion is photographed at four times normal speed (96 fps), then all other controllable actions within the shot must happen four times faster. Achieving an adequate level of good-looking lighting can be very difficult if shooting high-speed at a small f-stop. If using HMIs, make sure that there will be no flicker at the filming speeds. Scenes which are supposed to take place outdoors should be shoot outdoors if weather permits.
With stop-motion, shooting is accomplished at one frame at a time with the object being slightly moved by hand between each frame. One-fourth-second exposures or more per frame allow for great depth of field in low light levels. Stop-motion photography is used to give a freedom of movement and expression to an object or figure.
Motion-control photography is used when an object or figure is moved by computer-controlled motors at very slow speeds. Long exposure times per frame allow for very small f-stops. The computer can repeat the movements of the motors, which allows for multiple exposures. Any facet of a shot can be isolated and wedged for intensity, color, filtration, and atmosphere. The image can be built up through multiple exposures made from the chosen wedge frames, while the computer repeats the same motions each time.
Go-motion shooting is used when shooting animal or creature models. The major body parts are attached to rods which are moved by computer-controlled motors.
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