The Sydney Aquarium buzzed with excited families, but my grandchildren and I were captivated by a different kind of movement - the enchanting underwater ballet of the little penguins. With my Mirrorless camera in hand and my old DSLR in theirs, I was their patient photography coach, but these tuxedoed dynamos were the true stars. Unlike their larger cousins, these pint-sized swimmers seemed to defy gravity. Their wings propelled them through the water with incredible speed and grace, like tiny rockets dancing and soaring through the depths.