Thanks Kevin, yes tonight (Wednesday) might be the night, at the moment (9.30 am) it is fine and sunny, so I am keeping my fingers crossed. If I do get the chance tonight, I intend to take a range of shots through 18mm to 55mm at different ISO and different time lengths, if I plan this first then carry it out correctly, I should end up with a range of different results and then I will be able to see for myself what the real differences are.
