The LMB-25 is a lightweight clamp-on matte box designed to hold 2 to 3 filters on lenses up to 143mm in diameter.
The widest Master Prime lens the LMB-25 matte box will cover with two 4″ x 5.65″ filters is 14mm.
Holds Filter Sizes:
4″ x 4″
4″ x 5.65″
5″ x 5″