Hoya 67mm Introductory Filter Kit, UV, Circular Polarizer, 81A and Filter Wallet The Hoya Introductory Filter Kit is a General Purpose Starter Kit "Introductory Kit" means Real Savings to you over Individual Prices THE UV Filter protects your valuables from dust, moisture & scratches, leaving your optics underneath clean The Circular Polarizing Filter gives you Beautifull Saturated colors with Better Contrast & also Removes Unwanted Reflections from Non-Metallic Surfaces such as Water or Glass The Hoya 81A Color Conversion Warming Filter controls Bluish Coloration that affects Daylight-type Film