On Instagram, I’ve seen a lot of images with manhole covers in the foreground in sharp focus and a city scape behind them out of focus. I tried my hand at this the other night in Boston. It was not as easy as it looks. I made the top shot with my Canon. The one below was done on my iPhone and was much easier.
Often, the manhold covers are wet which adds reflections. The one above was wet from an earlier rain shower. Many photographers bring water with them to wet their manhole cover is mother nature doesn’t do it for them.