The Sunwayfoto DPG-3016 Stereography Rail is a heavy-duty camera bracket that can be used to mount two cameras on a single tripod. You can adjust the camera forward and back without moving the tripod, and you can also accurately find the nodal point for panoramic photography. It has six 1/4"-20 sockets and one 3/8"-16 socket for flexibility. There are M3 holes in twelve different positions on the upper rail for mounting safety stop screws.

• Compatible with Arca-Swiss-compatible quick-release clamps. Also for accurately finding the nodal point for panoramic photography. For close-up photography, you can slide the camera in and out without moving the tripod.
• Easily recognized laser-engraved scale on both sides of the rail to adjust the nodal point conveniently and accurately.
• Includes 1/4"-20 mounting screws, two M3 safety stop screws, two 1/4" screws for mounting clamps, 2.5mm and 4mm hex keys for installation, and four locating pins for directing the clamp direction.
• Includes 4 metal stops, each side has 2 metal stops.