Eric Pascarelli
Well-known member
Alrighty. Back and on the war path.
Quick and Dirty Deep ND Filtration Test (Schneider Platinum 1.8 and Formatt HMND 1.8)
While running about and in between meetings I zipped over to Panavision for something else entirely. However, while I was there we did a very quick and dirty deep ND filtration test using the Schneider Platinum IRND 1.8, my Formatt HMND (Hot Mirror/ND) 1.8, and just the clean lens as a control. We jogged out into the parking lot and shot these all within a few seconds of each other. The results shocked me and I feel I may have to do more tests. Like a lot more tests. Let me show you the test image:
It's been my experience that Neutral Density filters definitely have density, but are almost never neutral. Many times this is visible to the eye but sometimes you have to look at the numbers in post. I've never encountered anything that can't be corrected, though. You might have an extreme case here.