Got my brand new Nikon D700 today, and wanted to shoot at night. Lens: Nikon 50mm on f. 1.8. Default settings - havent played with it yet. What is all those "marks" - the blue marks a lot of places - I think it is 4-5 places and also the weird "light" to the left of the chimney (it is also a kind of blue even the roof is very red and the chimney is not blue) at the house in near the middle - a bit to the left. But also in the leaves of the tree - a little right for the middle. Is that banding or ?