Recently, I posted a video on my YouTube channel on profiling my phone’s cameras. I do this because I like shooting DNG and then processing on the desktop. But the video raised a question from a couple of people about whether the X-Rite ColorChecker could fix the colour cast with long exposures using neutral density filters.
It’s something I’ve wondered myself. I don’t really shoot a whole lot of long exposures with neutral density, so I never got around to testing the idea. I have now, though. In this video, I compare three pieces of glass for long exposures. The B+W 10 stop ND, a very cheap Andoer variable ND and a piece of welding glass.