Yeah those are really cool. If you want really good long exposure shots you will either need a tripod or a steady surface to prop the phone on because the shutter is going to be open for a long time and any movement will cause the inanimate objects in the shot to become blurry. You'll want to set the shutter speed to anywhere between 1/2 to 4 seconds and play around with the ISO settings until you get a result that's not too washed out. Typically the brighter it is outside the lower you will want to set the ISO setting. It's a fine balance. Hope this helps.I want to know how people take those night time photos where the lights stream and stuff