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Couldn't you make a film camera that was silent by rotating an array of lenses?
ELS122:
--- Quote from: TimFox on August 14, 2023, 03:57:56 pm ---Note that “full” IMAX cameras transport medium-format film (70 mm, similar to 2-1/4 inch 120 still film) horizontally through the camera, rather than the vertical transport in conventional movie cameras.
There is an interesting panoramic film still camera (modern version sold as “Widelux”, q.v.) that pivots the lens mechanically to cover roughly 150 deg.
--- End quote ---
Yeah so looking at videos showcasing the mechanism of those cameras it seems there isnt even any rotating lenses, instead it's using a drum shutter and that's enough to have a continuously moving film.
So why not do this in an IMAX camera? but instead of "rewinding" the drum, just rotate it continuously 360 degrees, that wouldn't require the film to "pause" on each frame.
TimFox:
How would you “delimit” the frames from each other?
ELS122:
--- Quote from: TimFox on August 14, 2023, 04:24:45 pm ---How would you “delimit” the frames from each other?
--- End quote ---
Well by the drum shutter of course, but since it's not a disc shutter it wouldn't distort the image if the film was continuously moving.
Siwastaja:
--- Quote from: mikeselectricstuff on August 14, 2023, 01:41:05 pm ---
--- Quote from: ELS122 on August 14, 2023, 01:21:16 pm ---So instead of moving to the next frame, "stopping" the film for the exposure time, and then moving to the next frame. Instead move the film continuously and have a rotating array of lenses that follows the light to each frame without needing to stop the film on every time? Thereby making the camera near silent.
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This is how some high-speed film cameras worked, using prisms or mirrors. You probably still need a shutter though
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Yes, and film editing tables, too, to project the image on a screen in continuous film motion.
https://en.wikipedia.org/wiki/Steenbeck#/media/File:Steenbeck_16mm_flatbed_ST_921_(6498601571).jpg (I had the same model as pictured lying around, but gave it away. It was nonfunctional due to so much aged electronics, poor connections, capacitors etc.)
In this use case, small amount of image distortion, jitter etc. is not a problem at all.
mendip_discovery:
They can get up to 120db but reading an article in them they also state they use a rotating mirror to record sound...odd but I'm not a camera tech. But the sound they record is really high quality.
I think that loud cameras on set is nothing new, they just had different solutions to it back then. I wonder if it's the directors who are great visionaries but as nobody will tell them no so they want to do a wide shot and a close up but don't want any of the sound gear or film gear anywhere near the set.
I thought with the size of microphones they could hide many on set to get good sound.
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