Underwater housing (WP-100/110) for digital cameras 95 x 145 mm, with lens made of scratch-resistant polycarbonate and enough space for the extension end camera lens (Electronics)
The envelope arrived in Thailand to 5m water depth with my little Sony Cybershot used. Although the packing may be a bit fiddly, but the shell holds absolutely tight - not a drop of water came in at just over 5 snorkeling gears. Through the lens zoom