Point 5: ND filters would have only stretched your shutter speed out (or forced you to stop down more) - they would not have altered the scene (with the exception of blurring the water a bit more - which I don't think it needs - or give you more depth-of-field, whicj I don't think it needs) Absolutely correct. Only thing an ND filter would do would allow the longer shutter speed on a bright sunny day. This would allow the water motion blur. But would not fix: >Point 4: IF you shot this image on a clear day (with a blue sky), the contrast range of the scene would have exceeded the range of the film (either the shadows would have blocked up or the highlights would have washed out). An ND filter would just shift everything down, not change the dynamic range. Could THIS have been the point of the original commenter? Perhaps (s)he thought the sky was blue, but washed out? [There are tricks to play by making two exposures, and combining in photoshop...] Keep shooting on these nice evenly-lighted days, 'Chelle.