Quote Originally Posted by Willie Jan
Is the bw 093 (087c) filter to high as i read somewhere on the internet to use for maco 820?
Yes. As others have noted, the cutoff of the 87c (850nm) is too high for Maco 820C. You'll want the cutoff point of the filter to be lower than the sensitivity point of the film - in this case 820 nanometers.

Personally, I like the look of this film combined with a Wratten 89b filter (B+W 092), which has a cutoff point of 720nm.