yesterday i had my first portrait shooting in a studio. I already had preimagined my lighting setup: a single softbox flash on the right for the general exposure and a big reflector on the left to soften and brighten up the depths. During the shooting however my liveview preview was almost pitch black, which is understandable when i use 1/60th, f2.2 on iso 50 in dimm lit studio. The only light source for the AF was a light through the softbox which was turned on when the flash wasn't firing.
Thankfully my Sony A7 III did an amazing job keeping track of the models eye to focus on. It seemed like it brightened up the liveview everytime i took an picture with prefocus on. I could most of the times could work the composition with the little time i had when the liveview exposure was increased during AF. All planned pictures of poses exceeded my expectations so everything turned out fine.
I think i should improve my workflow in this studio situation and realized i dont know enough of studio flash usage with my camera.
How can i preview the flash exposure and simultaneously use AF in liveview?