Imax Film Scan =link= ✓ 〈Certified〉
You cannot scan IMAX negative without a "flashing" calibration. The technician lays a gray card and a color chart at the head of the roll. The scanning software maps the unique color shift of that specific film stock (Kodak Vision3 50D, 250D, 500T, etc.).
When you perform a 16-bit log scan of IMAX film and color grade it for (4000 nits), the highlights become blindingly bright, and the shadows remain velvet black. Digital projectors are finally catching up to what 70mm film could always do. imax film scan