Features METALLIC MATERIAL: The reduction lens is made of aluminum alloy material, surface after oxidation treatment, pressure resistance and erosion resistance, owns a long service life INCREASE RATE: The best working distance is 120mm, the lens magnification is 0.7X, with the eyepiece focused, adjustable from 0.7X to 4.5x (about 10-180 times on the screen, about 0.49 to 126 times on the screen using 0.7X reduction). lens) Scope of application: The diameter of the reduction lens mounting thread is 1-3/4 inch. (42mm), used for 42mm industrial microscope camera for C MOUNT lens, useful and practical FUNCTIONS AND USES: The auxiliary lens can be used to reduce magnification, increase working distance, expand field of view, very versatile EASY INSTALLATION: Stereo microscope reducing lens adopts user-friendly design for quick and hassle-free setup, easy to operate, help a lot 1. METALLIC MATERIAL: The reduction lens is made of aluminum alloy material, surface after oxidation treatment, pressure resistance and erosion resistance, owns a long service life 2. INCREASE RATE: The best working distance is 120mm, the lens magnification is 0.7X, with the eyepiece focused, adjustable from 0.7X to 4.5x (about 10-180 times on the screen, about 0.49 to 126 times on the screen using 0.7X reduction). lens) 3. Scope of application: The diameter of the reduction lens mounting thread is 1-3/4 inch. (42mm), used for 42mm industrial microscope camera for C MOUNT lens, useful and practical 4. FUNCTIONS AND USES: The auxiliary lens can be used to reduce magnification, increase working distance, expand field of view, very versatile 5. EASY INSTALLATION: Stereo microscope reducing lens adopts user-friendly design for quick and hassle-free setup, easy to operate, help a lot Specification: Item Type: Reducing Lens Mounting thread: 1-3/4 in. (42mm) Application: For industrial microscope camera with 42mm C-mount lens, reduce magnification, increase working distance How to use: Take out the product and install it to use. Packing List: 1 x Reduction Lens Package List 1 x Reduction Lens