Originally Posted by MikeK
Long exposure is the way to go, but you also might try long multiple exposures - gives a bit more of a punch to that silky flow.
I believe our Les Maclean has posted some examples of this technique in the past.
I've seen a couple of examples of water done this way, I think by Les and/or Barry Thornton. They do give a sense of motion, and not so "silky". I prefer them myself.
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