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'pop' (1 image)
Been trying to get this set up just right? but every time the the dart hits the balloon theres not much left to see of the balloon? this is the best I can get, is there anyway I can set it up so there is more of the balloon left to see? I think I may need a faster response time I built a home made vox switch to fire the flash to my surprise it sort of works all suggestions welcome thanks.

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Comments (10)

I don't have the answer to your problem, but just some thoughts.....

A flash has an ouitput of about 1/20,000 of a second, with no shutter lag. You can stop a bullet with that. I've heard oldtimers talk about stopping a bullet by shooting it into a wire, which breaks and trips a flash, stopping the wire and bullet mid-flight..

When you say "VOX", you mean sound acitvated? You have a delay there due to the "slow" speed of sound. Plus shutter lag..

I don't have the answer to your problem, but just some thoughts.....

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Bossier City, Louisianahttp://www.pbase.com/ericsorensen..

Comment #1

Thanks Eric I think you must be right it has tobe sound lag as the picture was taken in a darken room with a long exposure of 6 sec and the sound switch fired only the flash? so it looks like thats the best I can get? regards colin..

Comment #2

Where is your microfon?.

You can controll the delay by moving the mic..

However the balon rips pretty fast, so there might be to much delay in the circuit..

Bye,Philip..

Comment #3

What does the popping sound represent? I think it represents a state of the balloon too far gone to make a great photograph. Even if sound travelled as fast as light, your balloon is too far gone when the pop sounds, I think. Maybe if the dart can break a light beam...Try something from the home alarm supply company, perhaps?.

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Comment #4

Colinhouse wrote:.

Been trying to get this set up just right? but every time the thedart hits the balloon theres not much left to see of the balloon?this is the best I can get, is there anyway I can set it up so thereis more of the balloon left to see? I think I may need a fasterresponse time I built a home made vox switch to fire the flash tomy surprise it sort of works.

Sound travels slow as compared to light. At least finite, not "infinite"..

So.... moving your microphone closer to the balloon can speed up the flash sync...

Comment #5

Just a thought:.

Put one balloon inside another, with a 1/2" space where the dart will hit. When the first balloon pops, it will contract around back of the unpopped balloon, and the dart piercing the second balloon will be caught better..

Try it with 1/4" spacing, 1 inch spacing, whatever, until you get the effect you want..

You may have to do a bit of PP cloning, from one pic to another, to remove any trace of the first balloon, but it could make an interesting pic with your setup...

Comment #6

How about some kind of thin conductive coating on the balloon. A thin wire connected to the dart would complete a circuit with the balloon on contact, firing the flash. You could then clone out the wire in photoshop..

Tylerhttp://www.flickr.com/photos/tcoen..

Comment #7

Thanks to you all, I will take on board what you all have said and will keep on trying? regards colin...

Comment #8

Colinhouse wrote:.

Thanks to you all, I will take on board what you all have said andwill keep on trying? regards colin..

Or perhaps set up a paper screen in front of the balloon, but out of shot. The dart goes through the paper, triggers the flash, then goes on to hit the balloon. You might need to introduce some delay electronically to get the flash late enough..

Or (probably difficult) let the dart pass through a light beam (infra-red) so it interrupts the light and triggers the circuit. With a narrow light beam that might be impossible. What about a wide beam of infra-red, and a sensor to pick up light reflected from the dart?Regards,Peter..

Comment #9

I think the usual approach to this kind of timing is a light or laser switch, not a sound activated switch. A set of infrared sensors and an infrared LED would be a good technique, but make sure the infrared isn't showing up in your photos (without flash) to avoid muddying the exposure..

[ e d @ h a l l e yc c ] http://www.halley.cc/pix/..

Comment #10

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