62mm Pro series Multi-Coated High Resolution Digital Ultraviolet Filter For Pentax smc Pentax-DA 18-270mm f/3.5-6.3 ED SDM Lens, Pentax SMC DA 18-135mm F/3.5-5.6 ED AL (IF) DC WR Lens This ultimate clear uv filter will not affect color balance. It protects lenses from expensive front element damage Reduces lens flare and ghosting Microfiber Cloth 62mm HD Filter