The ARRI Rota Pola Frame is compatible with LMB-5, LMB-15, LMB-25, LMB 4x5 and MB-19 matte box filter stages. It has the same width of a regular F4 filter frame and therefore only takes the space of one filter in a filter stage.
The glass inside is a round shaped circular polariser which takes less than 1.2 stops of light. The glass itself is available as a spare part (K4.0009410) and can easily be replaced by the end user when broken or scratched. Note: It is not possible to use any other glass inside the Rota Pola Frame than the original supplied by ARRI.
The advantage of using a Rota Pola Filter Frame instead of a 4”x5.65” glass filter in a matte box filter frame is not caring anymore about having a rotating stage in your matte box because the glass inside the Rota Pola Frame can be rotated in the frame itself by using a friction driven gear at the top or at the bottom of the frame.
The Rota Pola Frame includes a unique feature which is a lock off of the rotation (on the top of the frame on the right side) which is very helpful after the position of the filter is adjusted by the DP/Operator.
Like this there is no risk anymore that the position might be changed unintended. Note: There is a clear marking on the frame of how it should be aligned. The writing “camera side” should always face towards the camera.
