What is the difference in brightness between full daylight and a starry night? In the case of a time-lapse that Stephen Lewis ARPS was planning, 22 stops. Each stop is a doubling of the light entering the camera.
As the camera clicks away at, say 10-second intervals, for half a day, how are you going to adjust the exposure without disturbing it on its rigid mounting? By Wi-Fi. Unfortunately the adjustment points will be obvious in the sequence, but Stephen had some software which worked out where the changes were and smoothed out the change over a number of frames. It is in fact possible to buy a device which changes the exposure incrementally during the hours of shooting, but it is expensive and the software provides a £50 solution.
That is a taste of the technicalities behind Stephen’s work but the outcomes were fascinating and beautiful. Stephen is clearly one who relishes the technical challenges of time-lapse and one example was the way in which he had un-picked the process by which a phone app turned a scene into a spherical shape, he had then used it on his time-lapse sequences to produce a fascinating new sequence of ever changing spherical abstracts.
His presentation was perhaps the slickest we have ever seen at Crewe PS because every part of his talk was timed to the second, under the control of software on his tablet which he used to switch from sequence to sequence, tutorial to tutorial.
We just gaped in astonishment.
You can see his work on his website.
Member Morgan Griffiths is a film-maker and was experimenting with time-lapse recently, have a look at his sequences here (you can see that it can be used in many ways, social studies for example!