Bit late to the party but if anyones got any tips, let me know.
I have a tonne of regular ND's from shooting film and really don't want to invest in a set of IRNDs.
Looking into Hot Mirror / IR Cut type filters but all the ones recommended on other sites are circular / screw on types and I need a 4x4.
So far I've worked out the Schneider Tru Cut 750 works in the wrong part of the IR band to help the BMPCC, so I guess it's something closer to 680?
Any help is appreciated, thanks!