Thanks Simon. Yup, you'll definitely need an ND filter and a tripod. I usually play around in bulb mode but, due to my frugality with parking I had limited time so stuck on a 10 stop ND in AV mode with an overexposure of 1 stop to get the high key effect. I think this was around a 20 second exposure. To get an even smoother effect I play around with exposures of up to 1 minute. You need to juggle with low ISO and higher apertures to achieve different effects. I really enjoy playing around with these, it's fun (well, in my book.. !). Enjoy.Nicely done (as always) Helen. I want to try some long exposure stuff - I have a pier near me, but never successfully managed it. I'm guessing I'd need some ND filters and my tripod.
* starts to Google