Snow Geese Mosaic

The flight of overwintering snow geese at Bosque del Apache wildlife refuge in New Mexico is a great wildlife spectacle. According to text books, the geese are supposed to fly at dawn but it seemed they had not read the book. I waited all morning as a flock of several thousand loafed in a lagoon. Then a helicopter flew overhead and simultaneously they all took to the air . With a 400mm lens mounted on my Canon 5D Mark III, I had preselected ISO 500 to enable me to lock in an exposure of 1/1000th second and F/16. That combination gave me the shutter speed and depth of field to ensure the whole flock is sharp. In this instance, both preparation and patience paid off.