If you want to be picky you need the
filter spectral response
sensor (film) spectral response
film spectral response
colour of zone 1 shadow
or colour of zone that you want to control
convolute (and maybe integrate)
But depends what you are worried about, cine guy will want the leading ladies face spot on between cuts so incident with dome on her nose, Answell his zone 1 with some detail, HCB might not bother, he left things to his printer...
I use a dome on a Weston cause I shoot peoples faces (or hands) and I need to margin for non-Caucasians the shadows can look after themselves, no filters. If I'm doing hills and valleys, I bracket with or without filters, and meter on zone I if I can.