Available for hire we have a single Black Frost 0.5 or 1/2 (Diffusion) filter by Schneider optics in 4x4inch, 100mmx100mm size to suit a matte box. 

Black Frost 1/2: Subtle softening of skin texture with this classic black frost filter. It will gives some flairs in the highlights and tones down contrast while holding black level. Removes that video "edge." See the manufacturers link for more information.

No Filter                                         Black Frost 1/2 filter

This filter set comes packed in a soft case. This filter is also available in a 3 filter kit.