KEYSTONE for Ember

Designed for Freefly Systems Ember S2.5K and S5K!

We've taken what we learnt from KEYSTONE for KOMODO and designed a similar ultra strong, lightweight cage for ambitious builds and demanding workflows.


KEYSTONE (140 x 140mm) is symmetrical. Ember's form factor is a little less balanced. We've positioned Ember so the sensor becomes perfectly centred inside the cage — ideal for linear nodal roll axis shots and precision cinema robotics 🎥🔥

There's ample clearance to maintain airflow, change lens mounts and swap KipperTie Revolva ND cartridges!

We've included twelve ⅜"-16 Pin-Locks and three ¼”-20 Pin-Locks — based on the new ARRI interfaces standard.

Mount dovetail plates, rod mounts, rosette handgrips, transmitters, monitors, Powers Breakouts, and MDRs!

CNC machined from 6061-T651 aluminium billet in Tasmania Australia.


  • A total of 84 threaded holes
  • 2x ARRI rosettes / 4x cold shoe mounts
  • 4x M3 screws hold Ember in place
  • Sensor becomes centred
  • Mount a Bolt or Transmission transmitter
  • Quickly change from landscape to portrait mode
  • Easily swap KipperTie Revolva cartridges
  • Compatible with Freefly Ember accessories
  • Unlocks the Ignite Digi accessory ecosystem
  • Works with ARRI accessories like MAP-2 & CCH-2
  • 14oz / 401g including stainless steel rosettes
  • 5.51 x 5.51 x 1.85" / 140 x 140 x 47mm
    (KEYSTONE is the same height as ALEXA Mini LF)