Tiffen 4 X 5.6" Multi Rota 138mm Variable ND Filter
The Tiffen Multi Rota Tray (MRT) is a geared rotating tray that allows the use and rotation of a 138mm Circular Polarizer and Variable ND in a 4×5.650 tray and is ideal for matte boxes without a rotating filter stage or for those instances where a secondary rotating filter stage is required in a non-rotating stage.
The Tiffen Multi Rota Tray can be used as a Polarizer, a Variable ND, or as a Cool/Warm Filter.
Download Instructions Here