All photo samples are untouched, only resized and optimized for the web.
(This post was updated September 30, 2004)
A filter that typically screws onto the end of your existing lens. This filter is appears to be a single piece, and when screwed onto the lens, the top portion of the filter still turns to adjust the amount of effect.
By turning the filter, you would see thought the view finder a change in the light in your scene.
Reduce glare off of reflective surfaces like water and window panes. I find this handy for reducing post editing of reflections on classic car photography.
This filter is a good standard tool for outdoor photographers on those bright lit sunny days, and can add depth and more contrast to clouds and other elements in your scenes.
Here is a before and after demonstration on clouds. It makes them richer in color, and deeper in contrast, also better balancing the exposure.
It will tend to slow your shutter speed down just a bit, but on a brightly light sunny day, your potential shutter speed would so high, it would likely not be a concern.
Here's an example the Circular Polarizing Filter on a lake.
Before
After, through the viewfinder, I could see what is on the lakebed below. Also notice the clouds in the background and the island on the horizon both have more depth and definition.
Next, here is how it's works on a glass surface (courtesy your grocer's freezer section). It doesn't have as much effect at a 90 degree angle, but as you can see here, at about 40 degrees, it is very effective.
Before
After
