Neewer 77mm Filtro ND MRC a Densità Neutra Variabile tra ND2 a ND400, Vetro Ottico con Rivestimento Multistrato, Idrorepellente Antigraffio & Ultrasottile per Obiettivi 77mm : Amazon.it: Elettronica
Pig Iron 77mm FADE2BLACK Variabile Densità Neutra Filtro ND Fader. ND2-ND400 | eBay
K F Concept Variable Neutral Density Filter | K F Concept Variable Nd Filter - K F - Aliexpress
Amazon.com : K&F Concept 77mm Variable ND2-ND400 ND Lens Filter (1-9 Stops) for Camera Lens, Adjustable Neutral Density Filter with Microfiber Cleaning Cloth (B-Series) : Electronics