The 143-80mm Wooden Camera UMB-1 Matte Box Clamp Ring 143-80mmfrom Wooden Camera UMB-1 Matte Box Clamp Ring 143-80mmenables you to use your base or swing-away version of the UMB-1 Universal Matte Box as a clamp-on matte box with a lens with a front outer diameter of 80mm. The clamp-on ring is made from ABS plastic for a combination of strength and durability, and features a split ring design for a secure grip and built-in baffeles to prevent light leaks.

For UMB-1 Matte Boxes    For lens with 80mm Outer Diameter    Made from ABS Plastic    Split Ring with Baffles

UMB-1 Universal Matte Box Base and Swing-Away versions.

The split ring designs allows the clamp-on ring to compress while evenly distributing the clamping force on your lenses barrel. The baffles (overlapping areas) prevent light from leaking from behind the camera and fogging filters or degrading your image.

Related Questions and Answers

Q: 1. Will this adapter work directly with 77mm Rokinon Cine lenses? The outside diameter at the front of my cine lenses appear to be approximately 80-83mm, where the lens hood would mount. Does this adapter clamp onto the outside of the lens thread where a lens hood would sit?

A: For my understanding, this particular Genustech Clamp On adapter 80 mm ring is a 'stand alone' clamp on adapter that will only work with a modified lens type or those Duclos Lens, in which I never had used one before. It will not work with any type of screw in adapters or screw on lens. I had ordered this adapter once before and hope that it would work on both my Canon lens and Samyang (Tokinon South east asia title?) with a screw on adapter lens for various size. But it doesn't work. So i had to order screw on adapter ring instead to be able to fit on my Genus Tech matt box.Hope this help.

Q: 2. Does this have a holder for 4x4” filters?

A: Although the UMB-1 trays are designed for 4x5.65 filters, they will hold 4x4 filters as well, though they will not be matted on the sides. They should cover the viewing area of all but the very widest lenses.

Q: 3. what is a difference between swing away version and buying separately (basic+swing away)?

A: The Swing Away configuration includes an attachment that allows the matte box to swing out from it's fixed position. The Base configuration is static and attaches to 15mm rods.

Q: 4. Can this donut replace the Redrockmicro Universal Lens Donut on a Redrock microMatteBox?

A: This ring is 143mm. If the Redrock Mattebox has 143mm clamping opening it may be compatible. I do not see this spec listed on B&H.

Q: 5. Will this work with the Tilta MB-T12 Matte Box?

A: Yes. The following unit will accommodate matte box lens opening ranging from 134/114/110/95/80mm.

Q: 6. Can I drop in a rota pola frame in the clamp on version of this mattebox? If so, is there one that is recommended?

A: The RotaPola Rota-Tray 4x5.65" with Circular Polarizer should work well in this matte box, BH #RO1056TAPOLA. https://bhpho.to/3auXZFF

Q: 7. Does anyone know a Variable ND Fader can be used with this? I have a Cordvision 80mm ring attached to my lens. I have the Genustech Matte box Lite. Thanks.

A: There is not possible to use lens filters with this Clamp-on Leans Adapter Ring. Once you install it on your Matte Box this ring will let you fit the Cordvision 80mm ring and leaves no space to place a filter.

Q: 8. can I use the Swing-Away version for clamp on?

A: Yes, you can use the Wooden Camera Zip Box Pro 4 x 5.65" Matte Box (Swing-Away) as a clamp-on matte box. The clamp-on Zip Box Pro attaches directly to the front of a lens using dedicated backs of 114, 110, 104, 100, 95, 87, 85, and 80mm.

Q: 9. Can i use the universal donut on this clamp on version ?

A: Yes: Wooden Camera UMB-1 Universal Matte Box Cloth Donut for Non-Standard Lens (143mm) B&H # WO204900: https://bhpho.to/3h89Rmu

Q: 10. Does it take Diopters?

A: The bellows ring included in this kit integrates a 138mm slot for round polarizers. If you are mounting the diopter directly to your lens, you may then use the appropriate clamp-on ring that accommodates the front diameter of the lens.