On a warm summerday, with 50 euro worth of helium in three balloons, me, Hans-Peter and Martijn went to the vondelpark to try something I had been contemplating for a while: aerial photography using digital cameras.
The setup was relatively simpel: A 3.1 megapixel camera, hanging from three balloons (50-70cm). Total weight of the setup was somewhere around 450 gram, the balloons had a pull of about double that. Two threads of 100 meters connected the ballons to us, so that we could get the camera to land again.
The trickiest thing was the timing. The camera in question had a timer, but the delay on it was maximum 10 seconds (don't you hate non programmable devices). In the end we settled on making movies of 30 seconds. In 30 seconds the camera went up 40-50 meters or so. The result is below.