Quick one for you; the ARRI Studio Matte Box SBM 1.

ARRI Studio Matte Box SBM 1 Feature Video Tour

A studio matte box for filter sizes up to 6.6″ x 6.6″, the SMB-1 is designed to be used with bigger wide-angle prime lenses and
also with zooms.

The SMB-1 Tilt has an integrated tilt module that counteracts image artefacts linked to filter reflections by allowing the
matte box assembly to be quickly and easily tilted, without any need for additional ,accessories. A flexible, rear-extending control
shaft is available for the module, making it simple for the camera operator to adjust the tilt angle.

Filter stages can be stacked together as single or dual filter stage modules, accommodating everything from wide-angle coverage to multi-filter situations while minimising the number of components.

Filters are fully rotatable, the 2-filter stage accepts one geared filter frame, and all filter stages are fitted with independent “tray
catchers.” The matte box can be optimised for anamorphic filming by means of a unique 2:1 ratio sunshade, side flags and matte set.

The standard 4:3 ratio sunshade covers the full ALEXA sensor and permits repositioning in post. Top, bottom and side flags allow precise positioning thanks to advanced adjusters, and the top flag has folding side flaps to reduce overall width if required.

An accessory mount can be fitted directly onto the matte box body, offering surfaces for French flag arms and incorporating a 3/8-16″ sliding mount that is ideal for ultrasonic sensors such as the ARRI UDM-1. When used with the ALEXA, the SMB-1
covers the Master Prime 12 mm with a 2-filter-stage, the Ultra Prime 10 mm with a 1-filter stage, and the new ARRI UWZ 9.5-18
Ultra Wide Zoom with a 1-filter stage.

Please see ARRI for more on their Studio Matte Box SBM 1.

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