When shooting underwater, stop unwanted reflections by sliding thisLight-Shielding PadfromFantasea Lineonto yourSony E 16mm f/2.8 Lensbefore placing it inside an FML dome port. The pad prevents the light of your camera’s built-in flash from bouncing off the interior of your lens port, ensuring that reflections won’t compromise or show up in your images. The soft spongy side faces the lens, while the durable polycarbonate side faces out.