The MB28 is a three-stage swing-away production matte box designed for 6×6 filters, though is also compatible with PV (4×5.65″) size filters.

Although this studio matte box is aimed at larger zoom lenses such as the Angenieux Optimo 24-290, it can also be used with most other prime & zoom lenses thanks to a full compliment of reduction rings. This is particularly useful when using wider focal lengths or large-front primes that require 6×6 filter coverage.