Shallow dives on bright, sunny days in relatively clear water are optimum for taking photos, and if you want sharper images, you can’t be moving. I’ve found that when I slow down, the fish seem to move slower as well. Take some photos closer, then back up and change the angle. SeaLife recommends 12 to 48 inches for best results. Learn to control your buoyancy, and hold your breath to steady your hands. Move as little as possible so you don’t stir up the sand and cloud the water.