Mars 3 ( non pro) works with multiple exposure calibration times.

[dokipen3d]

I did a test file (without any resin) and the mars 3 correctly exposes different parts of the screen at different exposure times without lifting the plate (well actually it lifts it a tiny amount then puts it back down very quickly).

This is going to save so much time finding the right exposure for various resins :)

[Hazoooka]

You also have Calibration > Exposure time finder, made specifically for the purpose

[dokipen3d]

Yes that what I am using :) I should have been more specific. That is what is working.