Even on set for static reference images (i.e. to capture lighting for light extraction, and colourchart and grey/reflect ball for matching set to the shot foota

Even on set for static reference images (i.e. to capture lighting for light extraction, and colourchart and grey/reflect ball for matching set to the shot footage and colour correction) it mostly seems to have been Canon EOS 5Ds (II -> IV) over the past 10 years, at least in the Film VFX industry.