It's like sunglasses for your camera

I bought a polarizing filter for my Canon EF-S 10-22mm lens today, and drove to the Red Deer river west of Penhold to try it out. I remembered seeing a sandbar on the river when I was working awile back, so I thought I'd set up the tripod there and start shooting. I debating buying this filter for awile because when shooting with a super wide angle lens, apparently vignetting is common. But I like how it eliminates glare from water, increases colors, and darkens skies. It also helps protect the lens as well. Since the filter is dark, less light gets to the sensor in the camera, so obviously using a tripod is a good idea! With more practise, I'll hopefully get a good handle on this filter, and use it accordingly, but judging from these 3 photos, I already like what it does to my images.

Canon Rebel Xti
Aperture: F-8
Shutter: 1/15
ISO: 100
Focal Length: 10mm
Kenko 77mm Circular Polarized filter.

I tried to capture everything I'd like to see in a photo like this: Rocks, driftwood, waterfowl tracks, sticks in the water and the reflection from the dry, brown vegetation along the river bank. Notice how clear the filter makes the river look. The sky is unevenly polarized due to the 10mm focal length, but I knew that was going to happen buying this filter.

Canon Rebel XTi
Aperture: F-8
Shutter: 1/50
ISO: 100
Focal Length: 10mm
Kenko 77mm Circular Polarized filter.

I thought the point of the sandbar was interesting enough to photograph! There is no annoying glare from the sun on the river, which is awesome! And because 10mm can cover a large part of the sky, the sky at the top left is more blue than the sky at the top right in this photo - the sky was polarized to different amounts.

Canon Rebel XTi
Aperture: F-8
Shutter: 1/30
ISO: 100
Focal Length: 10mm
Kenko 77mm Circular Polarized filter.

Here I set yet another narrow aperture, with a 10mm focal length towards the river to show again that theres no annoying glare reflecting from the sun. I added some shoreline and dead trees, to try to make it more interesting.

Note: Upon researching polarized filters, you have to shoot 90 degrees from the sun in order to attain the greatest polarized effect, which I tried to do my best here. Each of these 3 photos were bracketed, and there wasnt any post image processing in Adobe Lightroom, just minor adjusting when I converted these from RAW capture to jpeg. And finally, I didnt feel like unscrewing the filter on and off, to show the before and after effect, which I'm thinking I should have!