Usage Tips:VERSATILE AND PRECISE: This Iris Diaphragm's diameter can be finely adjusted using the handle, allowing for optimal adaptation to varying lighting conditions. Ideal for diverse applications, it ensures high precision in controlling light entry. DURABLE DESIGN: Constructed with premium materials, the Iris Diaphragm Manual boasts a smooth, anti-corrosion finish. Designed for longevity, this accessory is a dependable choice for enhancing your optical inst ents. ENGINEERED FOR ACCURACY: The Iris Diaphragm Adjustable is meticulously crafted to offer exceptional precision. It's an essential tool for any laser, camera, or optical setup, ensuring reliable performance and meeting exacting standards. QUALITY MATERIALS: Made from superior materials, the Iris Diaphragm Mechanical is free from burrs and pressure points, preventing deformation. It integrates seamlessly with your optical systems, enhancing functionality without compromise. ESSENTIAL OPTICAL TOOL: As a crucial component for lasers, cameras, and optical platforms, this iris diaphragm adjusts to provide various aperture sizes to meet specific lighting needs, making it an indispensable tool for your equipment. Note: The inner diameter of the bracket is 12mm, and the outer diameter is 27mm Colour: As Shown Material: Aluminum Alloy Package Contents: 1 x lens Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.