The Feral Photographer: Photographing under fluorescent lights

Photographing under fluorescent lights. Почему при съемке при лампах дневного света творится всякая фигня с экспозицией и балансом белого. И как с этом бороться.

The reason for this is simple, fluorescent lights flicker. Too fast for your eyes to see, but depending on your shutter speed, your camera may be able to pick up the fluctuations. If the light uses a magnetic ballast, it will flicker 'off' 100-120 times a second (2 times for every cycle of the 50-60Hz line power). At high enough shutter speeds, one frame might be taken while the light output is at its peak, and another frame taken while the light is at its lowest resulting in significant exposure differences. At slower shutter speeds, the fluctuations end up being integrated together so you won't notice a difference between frames.