From: "Frank Bemelman"
Subject: Re: help needed to photograph a bullet
Date: Fri, 4 Oct 2002 19:35:36 +0200
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Organization: EuroNet Internet
NNTP-Posting-Date: 04 Oct 2002 17:36:04 GMT
"John Woodgate" schreef in bericht
> I read in sci.electronics.design that email@example.com wrote
> (in ) about 'help needed to photograph a
> bullet', on Fri, 4 Oct 2002:
> >The Matrix effect was done using large object/camera distances. The
> >original poster was trying to get multiple exposures of a reasonably
> >object (an apple). You'd have a hard time trying to arrange that many
> >cameras around it.
> Given lenses with a long-enough focal length, the cameras could be 100 m
Too expensive to use a large number of camera's. The effect seen in 'the
Matrix' movie is freezing the time, all camera's are triggered at the
same moment, and the individual frames are used to make a film. When
projecting the film, it looks as if time stood still, and the camera
moves through the scene; the jumping actor hangs in the air, frozen,
and the camera rotates a half circle around him.
For a bullet/apple you need a highspeed camera. Available as 16mm/35mm
filmcameras or digital cameras. Framerates up to 10000 f/s with normal
16mm film, digital cameras are slower. I once met a guy at Philips who
filmed the forming of certain crystals. He could film for less than
half a second, at 10000 f/s. A loud bang and a lot of smoke, when this
camera did its thing. Weird stuff.
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