Foto&Tech Hot Shoe Spirit Bubble Level for Canon Nikon Panasonic Fujifilm Olympus Pentax Sigma DSLR/SLR/EVIL/FILM Camera (Three Axis) Lightweight, small, durable, and clear as crystal Spirit level / bubble level for camera's hot shoe Easily identify if your camera is set up level on a tripod. A must have product for macro shooting Triple axis provides precise leveling All enclosed Design, not Water Evaporation