"POP!" captured by Louann Waters (Click Image to See More From Louann Waters)
The goal of the high speed photography is capturing objects in motion. You can photograph events that follow a predictable sequence. In all cases you want to be able to detect a trigger, wait for an event and take a picture.
For example, in order to capture a falling drop hitting the surface of water, first you need to detect the time when the drop starts falling. Next, you create a delay between the trigger and the event. Finally you take the picture.
There are two methods for performing high speed photography with the timer. The first method uses a shutter of a camera. The second method uses an electronic flash.
Shutter Method:
The main advantage of the shutter method is that it can be used outdoors. The subject and the background can be fully illuminated. Since the shutter is used to freeze the motion of the subject, it offers a limited speed. Maximum speed of a shutter could range from 1/4000sec to 1/8000sec, in some cases it may not be fast enough (fast moving objects will become blurred).
Moreover, in cameras that have a focal plane shutter, a small slit moves across the photographic plane at much slower speeds (1/250), thus exposing different parts of the photographic plane at slightly different times.
Finally, there is a delay between the shutter release and the actual exposure. It could be as much 100ms or more (depending on camera). In addition there could be a small variation in timing, each time the camera takes a picture. Therefore this method should not be used when high timing accuracy is required.
Flash Method:
The second method of high speed photography is the flash method. The picture is taken by opening the shutter of the camera, activating the flash and closing the shutter. The picture needs to be taken in a dark room. Because the room is dark, the long exposure time will not have any effect on the final output. The flash light duration now becomes the actual exposure time.
Photo captured by dan2452 (click image to see more from dan2452)
The lag between the trigger and the flash strobe is insignificant. The disadvantage of this method is that the picture needs to be taken in a dark room to avoid the over exposure. Also since the flash is used to make the exposure, it may be more difficult to provide a uniform lighting or to illuminate the background.
Equipment:
You will require three basic components for high speed photography:
- Camera.
- Flash.
- Photographic timer with sensors.
"Water balloon pop" captured by chris p (click image to see more from chris p)
About the Author:
Vito is an amateur photographer with particular interest in high speed photography. Universal Photo Timer is one of the general purpose photographic timers. Universal Photo Timer can activate camera shutter or flash in response to a trigger with a set delay. The timer interfaces to a number of optical and sound sensors making high speed photography ever more popular.
Check out this helpful video tutorial by the people from the Trick Photography eBook, you will learn how to freeze the motion of water splashes by using external flashes, a fish tank, and an object of your choice:
The trick photography training package is a very popular instructional eBook and video set that explain how to do most of the trick photos that often capture attention and amazement from viewers. With 300+ pages of information and 9 hours of video tutorials, it is very detailed and includes extensive explanations of many complicated techniques that are very fun to learn. It can be found here: Trick Photography and Special Effects
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