The Tilta 4 x 4" Lightweight Matte Box from ikan easily mounts onto 15mm rods via its rod adapter. It features two 4x4" filter holders. The lightweight construction adds very little weight to your system, and the swing away design moves the matte box out of the way during lens changes, without having to remove the matte box from the rods.
The matte box also comes 72, 80, and 90mm diameter lens adapters, and a fabric donut (Nun′s Knickers) to prevent light from leaking from behind the lens and reflecting off of filters and flaring your image. The matte box features a removable top flag (eyebrow) that attaches to a hinge so that you can precisely set the flag at the edge of frame to block light sources from flaring your frame.