Resolved! 1DX II + Zeiss Otus 85mm severe underexpose problem
Out of curiousity decided to try my Otus 85mm (used on the Canon 5dsr) on the 1dx2 and for some reason the metering system started going nuts. Tried full evaluative metering and spot metering - same thing. Instead of ISO 1250-1600 getting ISO 250. Tr...