Fixed Cage (Alexa Mini) is a form fitting cage for the ARRI Alexa Mini. It attaches by four M4 screws on top and four M4 screws on the bottom making it extremely secure. The same M4 hole pattern found on the camera body is present on the cage top plate. This allows for attachment of ARRI brand handles and accessories. Arrays of 1/4-20 holes in standard spacing and multiple 3/8-16 holes for large accessories. ARRI accessory mount also available in several places (3/8-16 screw hole with locating pins adjacent).
The cage side pieces feature NATO standard accessory rails with spring loaded safety pins on each end to prevent accidental removal. The NATO rails also feature 1/4-20 and 3/8-16 holes. Clamped to the side rails are two NATO Rosette (ARRI) which adapt an ARRI standard rosette to quick release NATO rail.
Fixed Cage (Alexa Mini) can attach directly to a tripod plate by the 1/4-20 and 3/8-16 threaded holes on the bottom of the baseplate. 15mm LW holes are present on the baseplate and allow for pass through rods.