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How To Photograph Exploding Balloons With 2 Sewing Needles But No Fancy Electronics

Feb 26, 2013 by Udi Tirosh 2 Comments

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Photographer Oriol Domingo sent in this tutorial which I find very interesting. It is a poor man’s high-speed trigger for shooting balloons. It is one part cable, and two parts sewing needles, but no electronics or fancy laser activated triggers. Oriol connects his trigger to the shutter port, but of course you could connect it to a strobe and get some crazy explosions.

balloon

One of the interesting techniques I hadn’t still tried until now was to capture an exploding water balloon just in the moment the plastic breaks, but the water still has the shape of a balloon. I didn’t want to invest any money in laser barriers or something similar, so I built a very simple mechanism that wouldn’t give me the perfect timing but maybe an acceptable approach.

Materials I used:

  • 2 sewing needles
  • A piece of plastic of about 20cm of length to build the lever.
  • 3 meter camera cable (for ease, depending on camera position)
  • A plastic washbowl
  • A small flash with wireless remote
  • A bag of small water balloons
  • A hot glue gun if possible (or just glue)
  • A tripod to hold the mechanism and water balloon, and another to hold the camera.
  • A mop!

Camera and flash settings

  • Shutter of 1/100 or similar is enough, because we’ll illuminate the water balloon with the small flash only.
  • I recommend using an aperture of f/8 or narrower, because sometimes water goes in many directions and this way we’ll get more dof.
  • For the tests the flash was at 0.5m approx, at 1/64 of power. I recommend using the lowest power if possible to get sharper results.
  • Camera focus must be set to manual and I also recommend to adjust the frame for each photo since the size of the water balloons is not always the same.

Shutter trigger construction

About the shutter trigger, my Canon 5D MKII uses an N3 connector, so I cut an old shutter cable ($4.95 on Amazon) to build the new one. It has three wires (Ground, Shutter, Focus) that will allow us to make a photo by doing a short circuit between Shutter and Ground wires. I’ve marked with a green dot the two necessary pins in the photo of the N3 connector. It’s not necessary to use the Focus wire since the camera will be in manual focus.

20130221_190101.jpg

To build the other side of the wire, I welded each wire (Shutter, Ground) to a needle. Then I used the hot glue gun to attach the needles to a long piece of plastic with a little inclination so that if the needles touch a rigid surface they will touch each other. My initial idea was that the water of the balloon would short circuit the two wires, but at practice it didn’t result in my case, so with a little inclination in the needles they also touched each other when breaking the water balloon.

balloon

balloon

To hold the lever I used the materials I had at home, but it’s possible to hold it in many other (and better) ways.

MG_9822.jpg

Once the setup is mounted, a water balloon is hold with a string in front of the lever so that when the lever is released it will break the balloon and the needles will also touch each other to activate the camera shutter and make the photo, so the only thing we have to do is hold the lever in a higher position and release it to make each photo.

balloon

Here is a before photographs

20130220_194314.jpg

And a few after photographs (shot with a Canon EF 28-135mm lens)

balloon

balloon

And lastly, here is a video of the mechanism in action:

As you can see the results are quite different between each other, because the timing was a little unpredictable. There are a lot of ways to improve this first test, trying to anticipate the explosion by placing the shutter cables in another place in the lever or changing the way the wires touch each other.

Opinions and questions welcomed.

About The Author

Oriol Domingo is an amateur photographer based in Barcelona, Spain. You can follow his blog here and his Flickr stream here. This post was originally posted here.

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Filed Under: Tutorials

About Udi Tirosh

Udi Tirosh is an entrepreneur, photography inventor, journalist, educator, and writer based in Israel. With over 25 years of experience in the photo-video industry, Udi has built and sold several photography-related brands. Udi has a double degree in mass media communications and computer science.

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