Premium variable ND filters made from Schott B270 Pro Cinema Glass. | Available in two models for precise light exposure control: 2-5 stop (ND 4-32 equivalent) and 6-9 stop (ND 64-512 equivalent). | 16 layers of anti-reflective coating and 'Liquid Glass' surface treatments ensure durability and image clarity. | Offers anti-static, hydrophobic, and scratch-resistant properties. | Easy to attach and adjust, perfect for various lighting conditions.