I’ve spent a while researching and trying out IRNDs for use with my Zeiss lenses, RED camera and even Blackmagic Camera (that really needs IR cut)
The Tokina Cinema Pro line are the ones I bought after an extensive search. There’s no colour shift. Nothing. They’re absolute quality, it’s basically exactly what you want from an IRND. They’re actually hard to review because they’re perfect. But they’re extremely easy to recommend. I will be buying more.