Yes, the E-M1X camera is Focus Stacking compatible with M. Zuiko Focus Stacking compatible lenses.
The following lenses are compatible with Focus Stacking.
- M.ZUIKO ED 30mm F3.5 MACRO
 - M.ZUIKO ED 60mm F2.8 MACRO
 - M.ZUIKO ED 12-40mm F2.8 PRO
 - M.ZUIKO ED 40-150mm F2.8 PRO
 - M.ZUIKO ED 7-14mm F2.8 PRO
 - M.ZUIKO ED 8mm F1.8 FISHEYE PRO
 - M.ZUIKO ED 8-25mm F4.0 PRO
 - M.ZUIKO ED 300mm F4.0 IS PRO
 - M.ZUIKO ED 12-100mm F4.0 IS PRO
 - M.ZUIKO ED 12-45mm F4.0 PRO
 - M.ZUIKO ED 100-400mm F5.0-6.4 IS
 - M.ZUIKO ED 150-400mm F4.5 TC1.25X IS PRO
 - M.ZUIKO 1.4x TELECONVERTER MC-14
 - M.ZUIKO 2x TELECONVERTER MC-20
 
Notes:
- The angle of view of the images created by Focus Stacking will be reduced approximately 7%.
 - Please update your firmware to the latest version to ensure full compatibility with the lenses listed above.
 
Menu Settings:
MENU à Shooting Menu 2à Bracketing (switch to ON) à Focus BKT (switch to ON)à
            Focus Stacking (Switch to ON)àSet number of shots (From 3-15 images/New to the E-M1X)à
            Set focus differential ( Focus point distance spacing, User adjustable depending on subject      
            matter)