SmallRig. This formfitting aluminum cage features an anti-twist three-point locking design and a variety of mounting options, and it maintains access to the camera's controls and hot shoe. It also includes an HDMI cable clamp to protect the cables from detaching.
Around the cage are multiple 1/4"-20 and 3/8"-16 anti-twist accessory threads, a top shoe mount, an integrated Arca-type base, and a QD (quick detach) interface for a strap.