Tiffen 138mm Variable ND Matte Box-Mountable Rubber Donutprovides approximately six stops of variable neutral density control without taking up any filter tray space. The variable ND is incorporated within a rubber donut that fits into a wide variety of matte boxes with a 143mm rear opening. It features a minimum of two and a maximum of eight stops of light attenuation.

The variable ND has no impact on the field of view that a standard donut that accepts a 138mm filter has, so there is no change to your workflow or shooting style. It features evenly spaced index marks from two to eight stops, but these are not calibrated marks and do not indicate amount of attenuation. A 114mm threaded rear ring accepts ARRI R2 compatible threaded reduction rings. The rubber donut is compatible with matte boxes from ARRI, Tilta, Movcam, Vocas, and Bright Tangerine.

2 to 8 stops of Variable ND Strength    For Matte Boxes with 143mm Rear Openings    Indexed Markings for Repeatability    Includes 114mm Anti-Reflection Rings    Compatible with Variety of Matte Boxes

Up to six stops of VND (Variable Neutral Density), with a minimum of two stops going up to eight stops (ND .6 to ND 2.4)

Fits directly into select rod-mounted matte boxes with a 143mm rear port

Rubber donut is supplied with a 114mm light prevention ring, which accepts ARRI R2 compatible threaded reduction rings

The outside of the ring features non-calibrated indexed markings for minimum and maximum settings

ARRI

MMB-1

MB-14

MB-18

MB-19

MB-25

Bright Tangerine

Strummer DNA

VIV

VIV5

Misfit

Movcam

MM_1

MM-2

Tilta

MB-T04

Vocas

MB455

Related Questions and Answers

Q: 1. 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: 2. With fabric on both sides, wouldn't this be able to fit on the MB12 Tilta matte box? I need to cover 5mm gap from 95mm-90.

A: The reason the Tilta TSP-023 (Nun's Knickers) work on the MB-T03 and MB-T05 matte box is because those matte boxes have a lip that catches the elastic band. The Tilta MB-T12 does not have this lip. Therefore, there is not an effective way to attach it to the matte box.

Q: 3. Can this be used with the Bright Tangerine Misfit Atom Pola+?

A: Yes. This is made to fit universally and should have no issues fitting on the Misfit Atom Pola+.

Q: 4. Will this fit an Arri MMB-2 matte box?

A: If your MMB-2 has a 114mm opening then yes it will fit.

Q: 5. would this fit a 95mm front? does the rubber stretch very freely?

A: Hello Mitchel yes it will stretch over the 95mm front. It will not be as quick as using a dedicated 95mm adaptor. I have found it easier to install the donut onto the lens first and then offer the donut to the matt box.

Q: 6. Will this Fit into Tilta MB-T04 Mattebox (4x5.65 Swing Away Studio Mattebox)? https://www.bhphotovideo.com/c/product/992629-REG/ikan_mb_t04_4x5_65_carbon_fiber_matte.html

A: No it will NOT

Q: 7. What is the maximum opening on the matte box side? I would like to use this with the RedRock Micro Mattebox

A: This part is designed for Tilta MB-T05 and MB-T03 Matte Boxes, it may not be a good fit for a Redrock Micro Matte Box. Instead you may want to look at B&H # RE1240003 which is designed specifically for the Matte Box you have.https://bhpho.to/2E0eQyp

Q: 8. 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: 9. does this fit onto the title MB-T04 as well?

A: No, it does not, sorry

Q: 10. can you use 4x4 filters?

A: Yes, you can use 4x4 filters.