Quick one for you the ARRI Mini Matte Box MMB-1 is designed for use with smaller popular HD camera bodies. The ARRI MMB-1 Mini Matte Box might come as a small form-factor matte box but allows for use of three filters, including one that is fully-rotatable round.
ARRI MMB-1 Matte Box Main Features:
Side-load version accommodates cameras with a top-mounted microphone
Top-load version replaces one side loading filter frame with a top loading frame
Rear stage fully rotatable
Can be supported by 15 mm LWS rods or clamped directly onto the camera lens
Suitable for lenses with a front diameter of up to 143 mm
Top and side flag attachments
To learn more about the ARRI MMB-1 Matte Box please go HERE.