Iris Aperture, 1.5 to 29 Mm Adjustable M42 to M42 Iris Diaphragm High Strength Manual Control Handy for Microscopes

1. SIZE AND THREAD: This iris aperture 1.5 to 29mm adjustable inner diameter, 55mm outer diameter, M42 to M42 thread. 2. ADJUSTABLE DESIGN: Adjustable diaphragm providing holes with different diameters in the optical system to meet different light requirements. 3. SIMPLE OPERATION: Change the aperture diameter through the handle, which is easy to operate and convenient to adjust. 4. PREMIUM MATERIALS: Made of aluminum alloy and stainless steel materials, ensure reliable performance and lasting durability. 5. HIGHLY PRACTICAL: The compact design makes the optical aperture diaphragm a more practical working mode. Specification: Item Type: Iris Aperture Material: Aluminum Alloy, Stainless Steel Inner Hole Diameter: Approx. 1.5-29mm/0.06-1.1in Outer Diameter: Approx. 55mm/2.2in Thickness: Approx. 17.5mm/0.7in Number of Blades: 10 Thread Diameter: M42 to M42 How to Use: Directly install and use. packing list: 1 x Iris Aperture