LR裏麵,直接exposure adjustment +- 4 stops, but:
1. fill light 100 is a lot of push, that is about 5stop for darkest shadows(reference? someone on DPR said so)
2, You can use as many as GND/brush, each of them can do +4 stops:).
But I guess even D800 will have lots of black clipping if u need to do above steps:).