6x6 Tray Adapter for 4x5.65 Filters

A friend of mine loves his 6x6 Mattebox but has a ton of 4x5.65 filters he wanted to use with it. After a bit of work, I got this out to him. This sits in a 6x6 tray slot just like the standard trays but it allows you to use 4x4 or 4x5.65 filters with your big mattebox.