How Do They Do This?

ianbarber said:
would a 10 stop ND really make the water look like that
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Yes indeedy. A 10 stop with a reasonable aperture (f8 or smaller) would give you a long enough shutter speed to blur the sea and sky sufficiently for the milky effect in that photo.
 
Welding glass, £3 and you can experiment to your hearts content without breaking the bank, and if your hooked go for the full monty.
 
Taztastic said:
Welding glass, £3 and you can experiment to your hearts content without breaking the bank, and if your hooked go for the full monty.
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I have just read about welding glass but the author of the website did say that it producs a very green color cast
 
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).
 
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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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