Hi folks.
I find my circular polarizer filter to be invaluable for reclaiming blue skies and cutting distracting reflections from windows, eyeglasses, drinking glassware, etc...
There are also times where you may choose not to use it, and I found this example that I shot from a walk in the park, where i had the CPL mounted and applied minimal effect vs max effect just to see how it works on water reflections. I thought you might find it useful.
OK, nobody ding me on composition- i was participating in the JDRF diabetes walk and had my camera and was snapping anything and everything along the way. The camera is a K10D with DA 16-45 and Hoya CPL.
On the left, i minimized the effect of the CPL and you see the water reflection is strong and mirror-like. This reflection also picks up the blue of the sky which is very nice. f/5.6, 1/500th sec, ISO100
On the right, i rotated the CPL 90 degrees [correction made] to maximize the filtered effect. The water loses its reflectivity and you can actually see the greenish color as well as some debris beneath the surface, yuck! Also, the nifty reflected image of the front bird is lost, as well as the concentric circles which give motion to the water. And, because there is less light reflected into the camera sensor from the water, the camera slowed the shutter slightly, to 1/350th sec and the overall contrast of the image is increased (f/5.6, ISO100).
There are obviously situations in which you would want to eliminate water reflections to see below the surface such as when photographing fish or swimmers, etc. This is not one of them.
Last edited by mikeSF; 11-05-2009 at 09:02 AM.