I am new to using Neutral Density Filters (got some for Christmas) and need some advice. I love photos with the movement of the water and plan to use the filters for this but when practising note that the filters effect the colour in the photos. See images attached with and without the filter. How do you overcome this problem. It seem less of a problem when it is darker but that is also when you often do not need the filters. (tried to insert images but would not work)