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Cheep High speed video camera Answered

I am a science teacher that needs a "cheep" high speed video camera for a project we do as part of our forces and motion unit.  The students build carts out of paper and straws, then race them down an incline.  I videotape them and then analyze the video and the students determine the speed of their cars. (see video here: http://www.youtube.com/watch?v=XqI5H8d4r7M).

As you can see from the video, the slow motion video is very blurry.  the frame rate is okay (they are only traveling at 2-4 meters per second, which means about 8-12cm per frame, perfect for the save we are using)., but the initial position and final position is just an estimate due to the blurry car.

Maybe I am not using the right terms, I do not know a lot about film/photography, but i need the individual shots to be clearer.

I currently use a Flip video camera, which is good because it is super easy to download the videos for student anaysis.

What kind of camera will suit my purposes, without spending more than $400?

Thanks,
Covo


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CovoRe-design

Answer 6 years ago

That looks perfect...will try it. I searched for an 'ible about this, but that did not come up. thanks!

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rickharris

6 years ago

Cheep no Cheap yes.

You don't indicate what you consider is Cheap.

For low cost you would be better off building a light gate and timing the runs.

In fact most science labs in the UK would have light gates and associated timers as part of their standard equipment.

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frollard

6 years ago

+1 to all the other answers;

Even a low fidelity camera can take great photos/video given:
-proper focus
-enough light to take FAST exposure videography. Add a few halogens and a medeocre film will become a great film


Pick up a camera capable of 480p+/60hz...nice even number for doing math...or find the computer drivers to run the PS3 eye camera (about 20-40 dollars) at 120 hz. At 4.0m/s that gives 3.3 centimeter divisions, and with enough light the blur will be almost nil.

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mpilchfamily

6 years ago

A higher definition camera would help but so would better lighting. Another thing that may help would be setting the camera parallel with the track and at a lightly further distance from the track. If its in too close the image will be blurry.

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Covompilchfamily

Answer 6 years ago

Thanks, I will try these things.

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Re-design

6 years ago

You need a higher frame rate. That would cut the blur,

You could try making a black line down the side of the cars.  This would serve as a target and will be easier to see.  Kind of a target.