Quote Originally Posted by Darvidanoar View Post
Sure, perhaps a picture will help:

at 17mm, the field of view is about 67 degrees. The area to the left of this scene is the point where the sun's rays are perpendicular to the direction light entering the lens and this is where the CPL performs best to reduce the general glare in the sky and the specular highlights. To the right of the image, where the angle of incidence is reduced, the CPL has had little or no affect on the glare or specular highlights.

I'm saying, if the conditions permit the CPL to work for you, then why not use it?
Sorry Dave, I am so thick yes you have to draw me a blueprint sometimes Great explanation and I get it now, doh.