http://photoextremist.com/the-complete-guide-to-long-exposure-photography
http://www.smashingmagazine.com/2008/11/09/60-beautiful-examples-of-night-photography/
http://www.manfrottoimaginemore.com/2014/03/17/10-tips-iphone-night-photography/#.VUOCcRZWvEI
