6Instructions on changing to an EF or to any other CP.2 mount1. Ensure that the groove on the rear side of the black EF adapter ring fits over thesmall screw of the lens barrel.2. Place the silver EF mount on the EF adapter ring in such a way that the blue doton the mount has the same orientation as the ZEISS logo and the support bracketpoints to the serial number on the lens barrel.3. Please note the correct orientation of the F mount to the ZEISS logo.