The 41.3″ RGX105 Quick Assembly Softbox from Sirui has a hexadecagon (16-sided) design and boasts versatility via its widely-compatible, removable Bowens mount. It sets up and breaks down in seconds, and features removable interior and front diffusers for contrast variation and a silver interior to maximize output.
The modifier covers a wide field, but you can add the included fabric grid to achieve directional control for selective lighting while minimizing spill light .
