try as I might, never got the water blurred to my liking while keeping the birds sharp. so I cheated… blended images taken @ 1/125 sec, and 1/8 sec in PS
dateApril 11, 2014locationYellowstone National ParkgearNikon D3, 600mm, 1/125 sec. @ f/6.3 ~ 1/8 sec. @ f/20