Watch the beautiful guts of a camera at 1000 fps with the help of Phantom Flex4K – YMCinema


Yet another fascinating episode brought to you by The Slow Mo Guys. This time they used the Phantom Flex4K to shoot at 1000fps into the guts of a Super 16mm film camera. Why? Because it’s the best way to learn how it works! Moviegoers, you have to watch this one!

Inside the film camera. Image: Slow Mo Guys

Have you ever wondered how film cameras work? geniuses Slow motion guys decided to use the Phantom Flex4K, which is capable of shooting beautiful 4K images at 1000 fps, in order to study how a film camera works. One of the best educational resources that explains and demonstrates the operation of motion picture cameras is the video titled “How a Slow Motion Motion Picture Camera Works”. For the demonstration, the Slow Mo Guys took an old Super 16mm film camera from 1971, and using a macro probe lens and zoom, they filmed inside the camera analogue, in order to precisely explore the functioning of this device.

The Phantom Flex4K.  Image: Slow Mo Guys
The Phantom Flex4K. Image: Slow Mo Guys

When shooting on a Super 16mm film camera at 24 fps, the film is exposed at 1/60 of a second. This was captured in 1000fps at 4K on the Phantom Flex4K, which is around 40x slower. This allows us to reveal this engineering phenomenon. And it’s quite amazing that a camera from 1971 still works perfectly. The demonstration shows us the incredibly precise mechanism of a film camera. The zoom lens was used to photograph the mirror and the prob lens was used to capture the moving film strip.

Looking closely at the sensor and moving film.  Image: Slow Mo Guys
Looking closely at the sensor and moving film. Image: Slow Mo Guys

Film cameras have a super precise mechanism that allows the film to be moved and the sensor to be exposed with precision. Basic Operation: When the shutter inside the camera is opened, the film illuminates. When the shutter completely covers the film gate, the film strip is moved one frame further by one or two claws which advance the film by engaging and pulling it through the perforations. The mirror that is the shutter must be maneuvered with precision, from exposing the sensor to mirroring the object on the eyepiece, and when the film strip passes to the next frame. The speed of the mirror depends on the number of frames per second. Although it is simple and has very old mechanics, it is extremely accurate and reliable. Watch the video below. We assure you that this is one of the best educational demonstrations of how a film camera works:


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