Camera that allows shutter speed control and a tripod.
Remote shutter release(to avoid wiggling the camera) and a Circular Polarizer or Neutral Density Filter. If you don’t have the filters you will need to shoot when light levels are low, almost to the point of getting dark – after sunset and before sunrise.
I mention Back Button Focusing in this video, helpful to keep the camera from refocusing each time you try a shot.
Even with the filters the best time is near dawn or sunset, the rest of the day is too bright, even if it is overcast.
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