For those of you shooting with the BlackMagic Design Cinema Camera [or looking into the Production Camera 4K], here's a quick and closer look at F&V's new BMC Cage. Assembly is pretty simple, and the final product fits nicely around the BMCC without obstructing any of the ports, doors, buttons, or screen.
At approx. 1/2" thick frame, the cage is rock solid and thick enough to mount accessories to any of the available 1/4-20" or 3/8" threaded holes over the top and along the sides. The frame can be adjusted to a wider setting if you need additional clearance around the sides. Unfortunately neither the Base or Advanced Kits come with a set of 15mm rails, so you'll need to provide your own.
Although there are cheaper BMCC cages available, I would say the build quality of this new F&V BMC Cage is at a very professional level, could easily match any of the more expensive brand names, yet the F&V BMC Cage Base Unit starts at just $369. More information about the BMC Cage (found here).
F&V BlackMagic Design Cinema Camera BMC Cage