The ARRI SMB-1 Studio Matte Box supports filter sizes of up to 6.6x6.6". It is designed for use with bigger wide-angle prime lenses, as well as zooms.
The SMB-1 Tilt has an exclusive, integrated tilt module and all versions benefit from stack-able filter stages, allowing quick reconfiguration
4:3 and 2:1 ratio sunshades are uniquely available, optimized respectively for spherical and anamorphic filming
Covers the full ALEXA sensor area and allows the Master Prime 12 mm to be used with a 2-filter stage, the Ultra Prime 10 mm with a 1-filter stage, and the Ultra Wide Zoom 9.5-18 mm with a 1-filter stage