These are generally assumed to be the ND filter of choice.
By using a rare earth metal coating, no longer do you have to worry about dye causing irregular colour shifts with certain filter strengths. These filters are regarded as one of the most neutral across all light spectrums, including UV, visible, and infrared.
Unlike other filter offerings, these work equally well across all RED and ARRI cameras in place of IRND and normal ND filters.
Size: PV - 4" x 5.65"
Strength: 0.3. 0.6, 0.9, 1.2, 1.5, 1.8, 2.1
Don't wait until hitting the edit room to find out you should have used these (yes, we've seen it more than once..)