This bird came out of nowhere over my shoulder, and I got a few shots off, but didnt realize I was only at 1/250th of a second. Only upon post processing did I realize it was a Peregrine Falcon. If only I had pushed my ISO to 320, maybe my shutter speed would have allowed a sharper image. Cant expect sharpness panning a falcon with 300mm at 1/250th of a second.