The D|Focus Systems D|Rails DSLR Baseplate is a lightweight, sturdy, CNC machined aluminum baseplate for your DSLR camera. Adhering to the Arri Lightweight standard, the D|Rails baseplate uses 15mm support rods spaced 60mm apart. The D|Rails DSLR Baseplate is the ideal "first step" in building up your DSLR based video rig. Use the D|Rails to securely mount accessories such as a follow focus, matte box, external monitor, electronic viewfinder etc. The D|Rails can be configured with 6, 8, or 12 inch rods.