Massa 52mm Professional Super Slim Water proof UV Filter With Multi-Resistant Coating Super Slim 4.5mm,No pressing ring design. Top transmittance over 98% Schott optical glass, high quality from Germany 8HD hardness is not easy to break and is durable to keep 16-layer coated, waterproof, scratch resistant,oil proof, Protect your camera lens Other sizes available: 52mm,55mm,58mm,62mm,67mm,72mm,77mm(See our Storefront)