54. Now you see the colored shims in the groove of the black lens barrel.5. Place the PL mount on the lens in such a way that the groove on the rear side ofthe PL mount fits over the silver screw on the lens barrel.6. Tighten the eight torx screws with the T6 torque wrench using a torque of 0.4 Nm.7. When the torx screws have been tightened, the lens can be fitted to a camerawith a PL mount and used.8. Check the flange focal distance of the lens (see section D) in combination withyour camera.