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Author
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Topic: Streeking car lights
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CrimsonVampire
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posted 05-27-2000 07:34 PM
How can I make a movie where the car lights streek by. I don't know how many of you know about photography, but if you set your shutter to B and left it open for 5 or 6 seconds you'd see the streeking lights, the same way pictures of lightning bolts, and fireworks are done to show them big, or more than one. How would the same effect be done on film? I have seen it done afew times and am wondering how. |
Prism
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posted 05-27-2000 08:06 PM
If we were talking about video...
Older video cameras (as far as I know) used to have what is called a vidicon tube. These were replaced by the CCD when they were invented, but you may notice that old home videos always have streaks which originate from particluarly bright light sources. Unfortunately these old cameras seldom had desirable picture quality. The only thing I can think of would be to set your video camera's shutter speed lower than normal. On film, you could film at a low frame rate and a low shutter speed. (i.e. time-lapse)Isaiah |
andy savage
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posted 05-28-2000 03:22 PM
on most good film cameras there is a way to change how long the shutter remains open for each frame- called shutter angle. you literally increase or decrease the angle of the opening in the shutter, which is a spinning disc. the larger the angle, the longer the shutter stays open, and thus motion becomes more blurred. in video, you can get most modern cameras to have very slow shutter speeds, 1/8sec for instance, and this blurs motion a lot as well. in post production you can use effects filters such as motion blur to acheive this effect- the bright parts of the image will blur as they move from frame to frame. i am sure there are other ways, but those are the one i know about. |
ebrigman
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posted 05-30-2000 09:32 AM
actually CCD video cameras will sometimes give you a vertical streak off of light sources... the horizontal streak from a tube camera is caused by a temporary burn on the tube...If you get a good tube camera the picture can be really good... problem is finding a good one... tube cameras generally give you a warmer/ softer look... not as crisp (not saying they are out of focus or diffused) | |
