Is it possible to add extra filters with the Cinefade VariND? — Cinefade
Amazon.com : NiSi 72mm Swift True Color ND-Vario | 1-5 Stops Variable Neutral Density Filter | Adjustable ND, True-to-Life Color, No Vignetting, Optical Glass with Nano Coating | Photography and Videography : Electronics
ND Filters: A Tool That Should Be In All Next-Gen Cameras | CineD