Hello Welcome to this step by step n° 4 for Multi Pilot Pro Today we will see together how to make the photo of balloon filled with water which explodes To undoubtedly make a success, we will use a new sensor The Contact sensor In fact it is rather an interface it is sufficient just to make electrical contact between the 2 poles for automatically sending his order enclosure Flash. Actually the case is settled as for other experiments : a minimum delay and an activation of 3 seconds The output is enabled if the Entry n° 1 past from ON to OFF or vice versa We can also look at the page that indicates the power value of the n° 1 We are currently in Standard mode, it is not a microphone The sensitivity is at 1 and you see below the level It is the voltage measured across the 2 terminals You see a number that oscillates around 3200 : these are Millivolts also 3 Volts There is no problem with a lower voltage to play with water You have any security problem.
The proof ! Nothing to fear So we can plug into the interface of the 4 mm banana plugs or screw with the terminal block of the classical bare wires As soon as the 2 sons touch we will trigger the Flash However according to the origin of your water you can have a surprise Watch ! Is that water does not lead to electricity, yes but very low ! In fact if you look at the voltage of the input n° 1 it did not fall enough He will have to adjust the threshold of the enclosure. It is on the next page you press 2 times on “+” that you do have the outbreak. You need to solve a voltage high enough so that it detects more easily a small current There I have set it to its maximum value : 2055mV I will back the 2 electrodes in water And you have a sure trigger. So what is the principle to get the picture? We have a balloon that is filled with water We will soak a first wire in the balloon and then with a second we will puncture the balloon.
As soon as the rubber will be torn apart there is an electrical conduction between the 2 wires and the box will send the order to the Flash to fire. Yet once we will work in the dark. The camera will be set to 2 seconds to F8 Flash will be set to 1/32 of power. We have a lot of reflection in the balloon And you can also make direct or indirect lighting test through the mass of water which gives excellent results. So much for the theory. We will go to the practice. I will prepare a peak to skewer by welding a small connector. But you can also use scotch. We will puncture the balloon with this pic. It will have to spend the second thread in the balloon. To do this you catch it, the weight of the water is expected to drag a wire to the bottom. You must work with the rubber more or less tended to allow the thread to pass.
This is. If you want to do things in a way very practical. You are going to do a hook ceiling that will hold the ball. Exactly where the focusing was made. Of course the setting will be in manual because we work in the dark. Then a small container coming to get 3/4 of water. There I worked with a small balloon to not wet my camera’s studio. But the most spectacular photos will be made with a ball of 30 cm of diameter. That will inflate with 3 or 4 litres of water. Better to be in a place that does not fear the humidity. And this will require that I burst the balloon. The timeout is currently 0 milli seconds. To get a picture at his tear We will repeat the phrase on this photo The Photos of the tear on the first line are between 0 and 2 milli seconds on a 16 cm diameter balloon once completed with water To have a photo of the ball that retracts is in a range between 2 and 20 milli seconds And to really get the ball clear of the rubber will choose an interval between 20 and 40–50 milli seconds.
At 200 milli seconds water has already left the fields photographed. I set the timeout to 2 milli seconds I put the self-timer device and we will to dive in the dark I trigger the camera with the self timer I place myself above the shutter You can see that there is water everywhere despite the recipient which still salvaged a part. After you have to fill the balloon of the same amount of water and to experiment with other timers to go a little earlier or a little later in the phenomen. Good experience..
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