How Do They Do This?

Welding glass, £3 and you can experiment to your hearts content without breaking the bank, and if your hooked go for the full monty.
 
It is the long exposure that does it...not the filter.
Water taken at twilight with a long exposure has the same effect.
 
Edit: Oops! Crossed thread with, erm, everybody :D

It's not the ND filter, it's the very long shutter speed. But of course in daylight you need a very dark ND to get those long speeds. A ten stopper reduces the light 1000x and 1/250sec for example becomes 4 seconds.

For waves and clouds, you need at least ten seconds to get a few wave cycles. Sometimes even longer for streaked clouds, depending on the wind.

Good dark ND filters are the LightCraft ND500 (9 stops, 77mm only, only from Premier Ink I believe), B+W ND110 (ten stops) or for square filter systems the Lee Big Stopper (10 stops).
 
Last edited:
ianbarber said:
I have just read about welding glass but the author of the website did say that it producs a very green color cast
Click to expand...

You can counter that with a custom white balance setting and a final tweak in post though, and a B&W conversion would negate that further still.
 
its all a trick with slow shutter speed....personally i like water to look like water or shaving soap...not a mist
e.t.h.o. i guess
 
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