The Falcon Eyes Universal D5 Diffuser Cup + Colour Filters enables you to manipulate the light emitted from your speedlite. The diffuse cup enables you to diffuse the light, while the colour filters allow you to create various coloured lighting effects. The D5 is mounted directly onto your speedlight and is suitable for speedlites with a minimum dimension of 72 x 43 mm and a maximum dimension of 60 x 36 mm.