| 摘要 |
For trick cinematography, a motion-picture camera is equipped with a pushbutton which upon actuation blocks or retards the windup of a film in a cassette while the film transport past an image gate continues. The advancing film, with or without exposure according to the desired effect (cross-fading or reverse filming), is deflected from an exposure gap in the cassette, either at the image gate or at a sound-recording head, into a loop received in an adjacent storage chamber from which it is subsequently withdrawn by reverse transportation under the control of a counter which registers the number of frames in the loop. The deflection of the film during the loop-forming phase may be effected by a baffle or by a perforation-engaging detent.
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