yes, a dreaded hitech that you had big problems with. I was scared that I would have issues with it as well, but turns out that color cast is very well controlled. IQ is definitely not a clean as the haida 10 stop, however, 16 stops is a ton of filtration, 5 minutes @ F8 iso 100. The sensor might have even produced hotspots, but honestly I didnt pixel peep those images, they looked ok, so I wasnt worried about it.
Did you take these 5 minut long exposures with the mark II? Would you be able to upload untreated RAW file? I'd like to pixel peep..









