The TimeLapse Photography
Have you ever seen the video time lapse? Initially relegated to shooting nature, they have become increasingly common and famous thanks to many cameras (professional and otherwise) that integrate within them simplify the controls for this type of video-photo.
Timelapse photography is to perform a series of photos in sequence after hours, minutes or even seconds, and then mount them in a video at normal speed (30 frames per second). In this way it is possible to “speed up the time”, for example by displaying the growth of a flower (days) in less than a minute.
A fundamental characteristic of the time lapse video is also the position of the camera: this must remain the same during all the shots, so as to keep the same “background” in all poses.
Theoretically, photography timelapse is not so complicated: you are taking hundreds of pictures in sequence and then are assembled together in post production. However, to get a good video and a good result, there is much work to do, both during the preparation and execution times.
What it takes to make a video Timelaspe?
The Interval. This tool allows you to take a certain amount of photos at regular intervals. This allows us to not sit next to the camera with a remote control and a timer, pressing the button every x seconds.
The interval timer is not trivially a stopwatch that every defined moment take a picture but it does more, especially if it is decided to use the automatic exposure (not recommended, anyway). If we are photographing every few seconds for a time not so long, probably the exhibition will be the same for all the shots, but if we have to take a picture every second over a period of several hours, we will have very significant differences in exposure between The photos. The interval timer ignores the shutter speed and subtracts the interval pre-set, which means that we will always interspersed with photographs the same way, regardless of the time of exposure.
Similarly, you can set the interval in such a way that maintains the same distance in time between shots, in which case the interval timer starts to count time when fully completed the previous photo.
Most modern cameras have intervallometri why it should not be necessary to refer to external objects but, if necessary, it will always be possible to buy one or use an interval timer “do it yourself”, using a personal computer.