Single-Tray Clip-On Adapter
I was down in Louisiana for a shoot: it was hot. It was humid. My DP wanted to shoot a master interview on a 20mm lens (Full Frame!) and was asking for a .3 ND. The 3-stage Tilta mattebox we were using was vignetting something serious so I had to do what many AC's have done before: tape the filter right onto the lens. The humidity was such that I had to use a lot more tape than I ever like to bother with and it looked very amateur.
Once we got rolling I got to thinking that I never want to tape a filter on a lens again and thus this tray adapter was born! After some test models I've landed on what you see here. This adapter is fit with the correct mounting points to accept the clip-on back you are using on your mattebox and has space and a thumb screw for one filter tray to slide in.
The next time I was working with the DP and he called for the ND on a 20mm interview, I slapped this on and had no issues with vignetting, no tape needed.
I have now made 2 different versions of this, one for the Tilta MB-T12 3-stage 4x5.65 Mattebox and the Arri LMB 25's. One to work with an Arri 6x6 Clip-on is in the works as well, be on the lookout!