The 4-leaf barndoor set mounts directly onto the Profoto Zoom Reflector. It is equipped with springs for mounting filters and/or honeycomb grids. It blocks unwanted light from the subject or camera lens, and shapes the light output from the flash head when used without grids.nnBarndoors, snoots, grids and filters are essential accessories for any lighting system. These devices modify the shape, intensity or colour of the light emitted by your flash heads. Think of them as a painter would consider a brush, or a sculptor a knife or chisel.nnUsing a set of barndoors will produce a beam of light when attached to the front of your light source's reflector. The size of the light beam will be determined by the opening of the barndoors and the distance between the light and the subject. Rotating the barndoor set will determine the angle of the light beam. A 4-leaf barndoor set offers better light control than a 2-leaf barndoor set.