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Better-Director-5383 t1_iu4kjs0 wrote

Tonwildly oversimplify it’s a longer exposure but since the shutter is open for longer you need a smaller Aperture so you need a camera you can adjust shutter speed and f stop.

Smaller hole open for longer lets in the same amount of light and then anything that moves like the water will have motion blur.

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ChartFrogs OP t1_iu5e45v wrote

Yes, need full manual mode and a steady tripod. This was shot at F/16 for 2.0 seconds, also had a circular polarizer on the camera

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