Quote Originally Posted by MikeK View Post
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.

In Les' book, he breaks an indicated 4 second exposure into 32 exposures at 1/125, so it's more what I'd consider multiple short exposures in that particular instance. Of course you can go with any combination of multiple exposures of any length that sum to the proper exposure length, and get a variety of effects in doing so.

The best way to get what you want, as always, is to make some tests and see what gets you where you want to go.

The longer the exposure, the "silkier", up to the point of overexposing.