The Diopter Frame 138mm from ARRI allows for select 138mm diopters of up to +2 to be used in a lightweight matte box such as the ARRI LMB 4x5 or LMB-25. The frame features two 4 x 5.65" filter frames and fits into a 2- or 3-filter stage. A safety mechanism prevents the diopter from falling out of the frame, and two 1/4"-20 threads allow the frame to be attached to an articulating arm.

For 138mm Diopters    For Use in a Lightweight Matte Box    Fits Into 2- or 3-Filter Stage    Two 1/4"-20 Threads

Related Questions and Answers

Q: 1. Hi. Does it work on Tilta mb- t12? Thank you

A: The ARRI Diopter Frame 138mm is only compatible with the LMB-5, 15, 25 and 4x5.

Q: 2. helloi wanna ask if the diopter stage can fit the close up filter +2?

A: yes but you can not slide in, you will have to open mattebox to pop diopter in.

Q: 3. Is the glass inside 138mm or a 4.5" filter?

A: I contacted ARRI concerning your inquiry. They state they do not have the filter on hand to measure, and while their website does not list the glass size measurement, they do believe it is a 4.5" filter. They state if you require the 138mm size, you need to go with a larger matte box and purchase the ARRI Rota Pola Filter Frame 6.6x6.6, B&H # ARK20017086.

Q: 4. Is this compatible with the older Arri MB20?

A: No. It is not compatible with the Arri MB20.

Q: 5. Any concerns with color shift vs other popular models? (Such as the Revar cine product?)

A: It is recommended you white balance with it on as with any filter but once you have there would be no color shift no. This is an excellent circular polarizer.

Q: 6. Is the polarizer glass fixed and non-replaceable?

A: Correct.

Q: 7. Hi, what mattebox size is this diopter frame for? It says 5,4 Inch, but the common mattebox sizes are 4x5.65 or 6.6x6.6 . Hoping it fits an Arri LMB 5 or 25 which is 4x5.65 .

A: The frame has the width of two 4 x 5.65'' filter frames. You will need at least a 2 stage matte box to use this frame.

Q: 8. Will this filter fit in the MovCam MM4 mattebox? I know the Tiffen fits, but this one Im not sure

A: After purchasing both the MM4 mattebox by Movcam and the ARRI RotaPola, they fit. So the answer is yes, they will work together.

Q: 9. This includes the polarizing glass, correct? Not just the frame?

A: Yes, a circular polarizer comes with the Arri Rota Pola Frame.

Q: 10. Will this unit fit the the trays on the ARRI LMB25?

A: This will fit all ARRI matteboxes with F4 frame compatibility – MMB-1, MMB-2, LMB4X5, LMB-25, MB-19, MB-29