Sony FX 6 Quick Start Manual page 118

Cine EI: EI Presets
Once you have the EI preset applied you can then determine the correct exposure using
the 77 percent line for the white card. In these VF details you can see how the iris value
changes as the EI preset changes. Also, the luminance values become a little more
compressed in the waveform monitor as you increase the exposure.
Overexposing more.
Same EI and Base ISO. Overexposing slightly.