The OConnor O-Box WM Mattebox Deluxe Set is a lightweight, wide-angle, mini-mattebox system that will accommodate lenses designed for full-sized sensors as wide as 18mm. The mattebox has 2 filter stages that accept either 4x4" or 4x5.65" filter trays and the rear stage rotates a full 360 degrees which is useful when working with polarizers or graduated filters. The O-Box deluxe set includes four filter trays, two each of the 4 x 4" and 4 x 5.65" trays, as well as the bellows ring that allows you to mount a 138mm filter as well. In addition to the standard eyebrow (top flag), the deluxe kit features lens siders and brackets to attach them to the mattebox, providing increased control over lens flares. The mattebox comes with a 15mm LWS bracket, and there are available brackets for a 15mm studio rods, 19mm rods, and adapter rings allowing you to use this as a clip-on mattebox.
A distinguishing feature of the O-box system is that it incorporates 3/8"-16 threaded mounting holes into the mattebox itself. This allows you to attach available O-Grips to the mattebox for added stability when hand holding the camera, or other available accessories. Also included with the O-Box are two universal lens rings that are made from aluminum with a seamless flexible material that stretches over a range of lenses and prevents light leaks from behind the lens, which can reflect off filters ruining your image. The two rings cover lenses ranging from 55 to 134 mm in diameter. Rounding out the deluxe kit is a reduction ring that works with the included bellows ring.