When I went up to Hunstanton, I knew one of the things I wanted to practice was using filters more to achieve some interesting effects. Now, I know a lot of people go down the route of blurring the incoming seas, but I like the effect and wanted to try it for myself!
One problem - I don't currently own a "big stopper". The darkest ND filter I own is a 1.2, so I could only reduce shutter speed to about 1/2 a second. Even so, I still got some pleasing blur of the tide.
Oh, another problem - the hitech filter was great, nice tones with little colour cast. The cokin filter however; this produced a huge magenta colour cast that had to be removed in Lightroom. So, the tint slider for this image is actually way over to the left in the greens! This is the problem with filters, and the reason I guess why so many people go for the Lee resins. Maybe one day...
[Nikon D90, Tokina 11-16 f/2.8 @ f/22, 1/5 sec, ISO 200]