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E. Section Introduction
It is recommended that to avoid issues with flicker from
some types of light fixtures that the shutter speed is
set to a multiple of the local mains electricity frequency.
Please check the mains frequency of the country you are
shooting in to determine the most appropriate shutter
speed. In a 50Hz country 1/50 or 1/100 is recommended.
In a 60Hz country 1/60 or 1/120 is recommended.
E. Shutter, Shutter Speed and Shutter Angle