Filter Lens

What are the best brands of filter lenses for shooting outdoors?

My Camera Canon EOS 50D, Lens Canon 18 67mm/EFS-75mm. What Filter brand lenses will be fine to make shooting outdoors? I usually like to take pictures of mountains, rivers, waterfalls, oceans, sunrise, sunsets and all the beautiful natural places, both in daylight and dusk.

The only filters I use are a polarizer, a graduate of neutral density, or a regular ND if I need a slower shutter speed. Here's a good article on the use of filter: http://en.wikipedia.org/wiki/Photographic_filter , And this site has links to more information: http://www.all-things-photography.com/using-filters.html Some good brands are B & W, Hoya, Lee, Heliopan, and Tiffen.

Filter Lens

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