Adjustable Clamp from 67mm to 82mm - SmallRig matte box 4409 featured a distinctive adjustable clamp design, range from 67 to 82 mm (2.6" to 3.2"), this matte box ensures extensive compatibility with a wide array of popular mirrorless and cinema lenses | Quick-release Design - This matte box showcases a three-point locking system, to swift assembly and disassembly by pressing the push rods on both sides of the clamp and a locking knob on top | No Vignetting - With its slim design, it accommodates circular and square filters seamlessly, ensuring no vignetting at focal lengths ≥16mm (for full-frame cameras and lenses), reducing glare effectively in challenging conditions. Additionally, you can meet your diverse filter needs for video and photo shoots by selecting from optional CPL, ND (ID: 4799), VND (ID: 4649), Black Diffusion Filter Kit (ID: 4650), and White Diffusion Filter Kit (ID: 4652). Not compatible with 4x4" slide-in filters | Note 1: If the external diameter of the mirrorless lens is greater than 88mm or the cinema lens diameter is greater than 85mm, this matte box cannot be installed | Note 2: A list of non-compatible micro and cinema lenses is detailed in the pictures, and instructions for using different filters are detailed in the manuals | Note 3: Before use, remove the UV filter from the front of the lens, and ensure that the top locking device is securely fastened, do not operate without the top knob securely locked