ARRI Matte Box MB-28
The MB-28 Mattebox was created specifically for use with the Angenieux Optimo 24-290 zoom, and is also compatible with prime lenses as well.
It features a three-filter stage and a swing-away system.
Natively designed for 6.6" x 6.6" filters, the MB-28 can be made compatible with all sizes of industry-standard filters.
You can also purchase this product at PhotoCineShop.