Silk Flow October 11, 2012 by Sonic4Spuds Nikon D40 - 10/2/2011 - f-22 - 1 sec - ISO 200 - 33mm eqv.An unusual overhead slow shutter photo of the Amnicon River. This is one of my favorite slow shutter photos because of the perspective. View fullsize A top down, slow shutter photo of flowing water.