Which controls are you using? In Premiere there is a specific exposure slider. This is comparable to adjusting the master luma level on the 4-way color wheels in FCPX. If you adjust the highlight wheel in Lumetri’s 3-way, then that’s comparable to the highlight wheel in the FCPX 4-way. However, if you are adjusting the specific highlight slider in Lumetri, then there is no equivalent control in FCPX, although you might be to a similar point using the curves.
– Oliver
Oliver Peters – oliverpeters.com