Rolling Shutter
- Thread starter PatR
- Start date
Note the use of a high speed camera. An alternate is a global shutter but they come in much larger cameras.
Rolling shutter only shows up in video footage only, so the following does not apply when
taking still photos. The effect is overcome by using Neutral Density filters. Since the CGO
series of cameras has a fixed aperture lens, the exposure is primarily adjusted with the
shutter speed.
By using the ND filters you will slow down the shutter speed to eliminate this video effect,
and provide a more natural "cinematic" look to video footage. Primarily the specific artifact
that we see in our footage is "prop flicker". You are actually seeing the blurred shadows
from the props. By slowing down the shutter speed, the blurring increases to the point
of no longer being able to be perceived at all. Same is true for the rolling shutter distortions
shown in the video above.
A similar effect can be seen here with a photo I took at the United Airlines terminal in
O'Hare Airport in Chicago:
ohare_terminal
It was taken at 2PM. The shutter was set to take a time exposure of about 1 minute.
That was long enough so that the 150+ people going past my vantage point on the
people mover, to completely blur them out of existence, and for the overhead
flashing neon to completely illuminate.
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