Rooftop view as 2012 was turning to 2013. We left the warmth of the house to go up to the roof and apply what we'd learned in our night photography course. Unfortunately, I was using an unfamiliar lens and new tripod -- not a good combination, so only one of my photos gave me anything to work with. In the end, the contrasts and patterns were most interesting, so I converted to black and white.
Junko and I took a course in night photography, and one of the techniques we learned was moving the zoom slightly or quite a bit for different light effects. I wish I could remember how I did this -- it was a barely anything movement of the zoom. I suspect I wouldn't be able to do it again -- a lot of luck was involved!