Hoya 77mm DMC PRO1 Clear Protector Digital Filter
Designed specifically for protection, this Hoya won't affect your images at all while still keeping the front of the lens safe. Multiple coatings ensure the filter won't cause reflections that could negatively impact the image by causing ghosting. A black frame coupled with black-rimmed glass help to further reduce negative reflections. And speaking of the frame, it's a low profile, so it won't cause vignetting, even on wide angle lenses. These filters are high quality options, and even come with a UV protected case for storage.