E-21: • Seal the Case by turning both buckle lock levers down inarrow direction. When one of the buckles is left open, theCase will not be sealed and water leakage will be caused.CAUTIONSeal the Case.When the rear lid is closed(quietly, so that the O-ringwill not come out of thegroove), the buckles areengaged with the edge ofthe rear lid, and the bucklelock levers are pushed downin arrow direction, the Casewill be sealed airtight.Check the loading status.Always perform the following final checks before sealing the Case. Has the digital camera been loaded so that the zoom lever operatesproperly? Has the silica gel been inserted all the way at the specified position? Are the O-ring and the O-ring contact surface free of dirt and otherforeign matter? Is the O-ring installed properly both on the front and rear lids? Is the TTL cable connector cap attached securely?Install the special balance weight.Install the special balanceweight to the tripodmounting thread at thebottom of the Case.Install the balance weightsecurely by tightening theaccessory screw of thebalance weight.