For a guy that has a background in software development and CG/post production the ever wonderful world of production craft and equipment can be full of small technical hurdles. Sometimes it takes a moment or two to make sense of what others have honed for decades. When looking into matte boxes and filters one of that “what?!” moments was when I looked at ND (neutral density) filters. Wading through filter stages and form factors like 4x4 and 4x5.