Strange water formation in long exposure

Started Jul 22, 2013 | Questions thread
Tim Hutson Forum Member • Posts: 79
Re: Strange water formation in long exposure

I have never considered how the signals from the CCD are sampled by the camera but this photo suggests to me that the droplet effect may be a result of CCD sampling frequency.  The spacing of the droplet seems to be somewhat proportional to the speed a droplet would take in an arc like that.   That is, it is relatively widely spaced toward the bottom of the arc on each side of its apex where its speed is greater.  The closer spacing near the apex suggests a slowing of the droplet which is to be expected.   If the camera does not just bin all of the light intensity until the shutter closes, but instead frequently samples the intensity of the CCD pixels and adds or co-adds the intensities, the images of the droplet (which are pretty bright) would simply register as bright spots in the image each time the CCD signal is sampled and the droplet has moved.

Anybody know if this is the way a time exposure or exposures in general work in today's digital cameras?

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