Filmmakers can use the Tilta 77mm Adapter Ring to secure a lens with 77mm filter threading to their Tilta Mirage matte box. The adapter ring also features 77mm female threading on its front, allowing the attachment of a screw-on filter to the lens. Package includes:Tilta Adapter Ring for Tilta Mirage Matte Box (77mm)Matte Box Size: 95 mmSupported Lens Diameter: 77 mmFilter Size Supported: 77 mmMount: Type ClampMaterial: Aluminum, SteelWeight 2.88 oz / 82 g