If you own an unmounted 138mm polarizing filter, you can use this Rota-Pola Tray from Revar Cine to install it into a matte box that accepts 4 x 5.65" filters. The tray has a lightweight and rigid aluminum construction, and rotating the gears that extend from either side of the tray will adjust the polarizer in order to easily achieve your desired result. The advantage of this setup over a standard filter is apparent when the matte box is mounted on LWS rods. This setup usually prevents the full 360° rotation of 4 x 5.65 filters, but with the Rota-Pola solution, the filter rotation takes place inside the tray, so there is no interference with LWS rods. Additionally, matte boxes that don't feature rotating filter stages will now be useable in shots that require a rotating polarizer.

Works with Most 4 x 4.65" Matte Boxes    Tray Holds Unmounted 138mm Filter    Manufactured from Aluminum

Related Questions and Answers

Q: 1. Does this fit with SmallRig matte boxes?

A: Yes, the Revar Cine Rota-Pola Tray will fit in a SmallRig matte box that uses 4x5.65 filter tray.

Q: 2. Will this work with the wooden camera UMB-1 clamp on mattebox?

A: Yes, this should work well with BH #WO201900.

Q: 3. Does this fit into a Tilta mattebox t12?

A: yes. although earlier comments say it cannot.

Q: 4. Is this compatible with the Wooden Camera Matt box?

A: Yes, this should work with matte boxes like the Wooden Camera Zip Box Pro 4 x 5.65" Matte Box (Swing-Away), BH #WO266400.

Q: 5. Does this tray also accept the138mm diopter close up lenses?

A: The Alan Gordon Enterprises Revar Cine Rota-Pola Tray for 4 x 5.65" Matte Boxes accepts only unmounted 138mm filters. All known 138mm diopters are mounted.

Q: 6. Will it fit into a Bright Tangerine Misfit mattebox ?

A: Yes, I have used it in my Mistfit for the past couple of years no problem.

Q: 7. Does the Schneider 138mm Diopter Split lens fit in?

A: The Alan Gordon Enterprises Revar Cine Rota-Pola Tray for 4 x 5.65" Matte Boxes accepts only unmounted 138mm filters. All known 138mm diopters are mounted.

Q: 8. Hi just wondering if when using this filter on a 4.5mm wide angle B4 ENG lens, weather you get any vignetting when fully wide as wanting to put in in the front tray of my Croszniel matte box not the rotating back one. Based on filter being 4 x 5.65 sizing as mentioned above?

A: The diameter of the filter is 4.5. If this is a larger diameter than the front element of the lens you own, you should be good.

Q: 9. Does this filter come with any sort of protective soft case?

A: It does!

Q: 10. will this fit in a bright tangerine misfit atom?

A: Yes, this should fit in to Bright Tangerine Misfit Atom. https://bhpho.to/2nQCgAl