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15,000,000 FPS camera


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#1 Christopher Sheneman

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Posted 21 November 2012 - 06:15 AM

Interesting one-minute documentary clip on Youtube about the cameras that filmed nuclear bomb tests, curious on what the inside of the camera would look like..


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#2 Geoff Howell

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Posted 21 November 2012 - 07:18 AM

there's interesting stuff about the 'Rapatronic' camera here

The way they explain about 'the shutter with no moving parts' makes it sound deceptively simple, I wonder why it didn’t catch on in other film cameras at the time
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#3 Mark Dunn

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Posted 21 November 2012 - 11:38 AM

The drum camera used a stationary strip of film inside the periphery of a drum about 8' in diameter. The image was reflected off a spinning mirror rotated at high speed by compressed air and focused onto each frame by a separate lens, thus giving a very high apparent framing rate. Only a hundred or so frames were exposed at a time.
The framing rate for moving film has always been much more limited, a few thousand per second, limited by the strength of the film base.
As far as I can see each Rapatronic took a single still image so it wasn't a cine camera as such.
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#4 Freya Black

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Posted 21 November 2012 - 12:14 PM

there's interesting stuff about the 'Rapatronic' camera here

The way they explain about 'the shutter with no moving parts' makes it sound deceptively simple, I wonder why it didn’t catch on in other film cameras at the time


Don't Nuclear explosions give out an electromagnetic pulse? Seems a magnetic shutter wouldn't be that great in that situation but then I guess they are filming from far, far, away?

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Freya
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