Thanks for the comment Jeremy. I have multiple shots taken here at a variety of shutter speeds. Unfortunately the shorter speeds were taken in shadow and the light collapsed for the day 2 minutes after this shot. I may well blend some detail from the shorter exposures into this shot and see what that looks like. I could do with a 3 stop ND filter as I can never get to my preferred exposure time for water shots in bright daylight.
Ken
If the shots you took where all from the exact same position without changing f/stop etc, but with using various shutter speeds, then all you need to do to get the exact water exposure that you want, is load the above worked file into a stack with the shorter exposed version in PS, auto-align them, then with the shot with the more defined water on top, go to your channels palette and holding Ctrl click the top RGB channel, this will select all the highlights (the water and sky etc), then jump this selection into a new layer (Ctrl+J) and turn off or delete the layer where it came from. Now add a black mask to the jumped selection layer and with a soft white brush at 100%, paint the water back into the shot with the layer set to 'Luminosity'. You can then try moving the opacity up and down for the layer to blend it into the water to just how you want it to look.
If the water looks good but isn't bright enough from the second version, then duplicate the jumped layer and its mask and set it to 'screen' and again play with the opacity slider until you get just what you want.
Dave
