On the way out of Manger Square, down a steep drive and onto the commercial street, a woman in fashionable trekker gear with a $1,000 Canon digital SLR slung from her shoulder pulls out her phone and aims the little plastic lens at the street generally. You have seen pictures like the one she has just taken — slightly skewed vistas of a lot of pavement and distant pedestrians and colourful street signs and maybe the hood of a passing car.