Instruction manual

The 4" x 4" production matte box for 16 mm zoom,
standard and high speed lenses, with its three filter planes,
affords optimal operation versatility for motion picture
productions. Two 4" x 4" filter frames are rotatable and
slidable for graduated filters. The likewise rotatable filter ring
which can be replaced by a reflex prevention ring, is
designed to take 4 ½”, round filters. The production matte
box is fastened to the support rods of the bridge plate (see
also »The bridge and support plate«) or the support plate
and can be swung away through 90° to change the lens.