I never get over how strange it is to see ducks fly!
Growing up I only ever experienced ducks in ponds or waddling around a yard. For some reason this idea has stayed with me long since I learned the truth that they really do fly. This image taken along the Torrens River after sunset still seems incredulous to me.
To capture this image I needed quote a fast shutter speed to render them fairly sharp in flight with minimal wing blur. I also needed a smallish aperture to get good details in the tree silhouettes and the details in the clouds. All up not an easy combination of constraints. I opted to shoot at 1600 ISO and compromise at F4.0.
Photo: Robert Rath, '366 Days of 2012, Day 249 - When Ducks Fly'. 1/1600s f/4.0 ISO-640 105mm