I bought a Cavision matte box (MB385P)a while ago and just received cokin P filters for it today. Unfortunately the filters are way too big even though the website states they fit. What's everyone else using?
I just spoke to Bernie at Cavision.
He told me that only 3X3 filters fit the stages and that the cokin P filters will fit the matte box without the filter stages. They slide right in. I'll just make sure that when I get a circular polarizer, that it is the correct size so I can rotate it.