Negative Supply Two-Axis Hot-Shoe Bubble Level

This Two-Axis Hot-Shoe Bubble Level from Negative Supply has a crystal clear housing with two bubbles and mounts onto any camera's hot-shoe mount in either a horizontal or vertical position. It allows you to align the camera precisely on two planes, to keep the horizon line absolutely straight. This is necessary for accurate leveling of the film and camera when scanning, or any other photography requiring fidelity to a horizon line or other straight-line elements.