Add even more accessories to the Smart Z-Finder viewfinder for your smartphone rig with this Accessory Rail from Zacuto. The rail requires the separately available Bridge for installation onto the Smart Z-Finder. It provides five more shoe mounts and multiple 1/4"-20 and 3/8"-16 threads to add a variety of accessories. The rail mounts onto the Bridge using a shoe mount, and it secures further using a 1/4"-20 screw.