ARRI ALEXA Plus - Page 230

230 ALEXA XT Cameras
To shim the mount:
1. Remove lens or lid (1) from the PL lens mount and turn the lens lock
into position CLOSED (2):
2. Unscrew (only with a TX6 torx screwdriver!) the four accessible torx
screws (1) that hold the lens lock (the other two torx screws are still
hidden by lock position CLOSED):