Taking the replacement of the CATTA ACE 35-80mm PL mount with an EF mount as an example:

(This tutorial is applicable to PL-EF/EF-PL/PL-LPL/LPL-PL/EF-LPL/LPL-EF)

Note: Do not use or exert brute force when tightening the screws. The torque must not exceed 0.4N·m, as exceeding this torque may cause the screws to break!

Mount Disassembly

Step 1: Using the provided Torx T6 screwdriver, turn counterclockwise to remove the PL mount fixing screws.

Step 2: Adjust the shims data to restore accurate focus data;

Step 3: Locate the positioning point on the rear end of the lens - the lens mount positioning pin index;

Take out the EF mount to be replaced and align the positioning point on the EF mount - the groove on the EF mount.

Step 4: Align the groove on the EF mount with the positioning pin index on the rear end of the lens for installation.

Step 5: Hold the lens body steady and rotate/shift the EF mount. If the mount cannot be easily rotated, it indicates that it has been installed in place.

Step 6: Using the Torx T6 screwdriver, tighten the corresponding screws of the EF mount clockwise to secure it.

Step 7: Check if the EF mount is securely installed. At this point, the replacement from the PL mount to the EF mount is complete.