Underwater Photography Glossary

These lenses can be fixed, zoom "rectilinear" (no image distortion) or fisheye, which creates a unique super-wide perspective with purposeful and creative distortion. Wide-angle lenses require a dome port, and some lenses will additionally require an extension ring, which sits between the housing body and port. Because you can shoot very close with a wide-angle lens and yet still make your subject appear to be several feet away, wide-angle lenses allow you to ""take out the water" (and its associated backscatter), and make even slightly turbid water appear extremely clear.