JSR DSLR Camera Round Color Filter 1. Optical resin lenses enhance transmittance and reduce reflectivity, ensuring image quality and reproducing high-definition images 2. Aluminum alloy frame for high hardness, oxidation resistance, and corrosion resistance 3. Frame knurling and matte finish prevent slipping and facilitate removal 4. Threaded front frame allows for mounting lenses, lens caps, and other accessories 5. Filter function: Different colored filters serve various purposes in color and black-and-white photography. Select a filter based on your photographic needs to control light and enhance creative expression 6. Lens material: optical resin 7. Frame material: aluminum alloy 8. Compatible diameters: 30.5mm, 37mm, 40.5mm, 43mm, 46mm, 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm, 82mm 9. Frame thickness: approximately 5.5mm 10. Lens thickness: approximately 1.1mm 11. Note: The actual product corresponds to the model listed in the title. Images are for illustrative purposes only Proper lens cleaning steps: 1. Blow away dust from the lens surface 2. Clean the lens surface again with a clean, soft-bristled brush 3. Gently wipe with a microfiber lens cleaning cloth 4. Store in the designated case when not in use