Quote Originally Posted by MarkChap View Post
Since when has the "primary" use for a polariser been to "enhance" the blue of the sky.

I have always considered the primary use of a polarise to cut down and through glare and reflections, or more correctly to reduce the polarised light.
It's the most commonly referred to use for polarisers, whether it be in books, magazines, or online - enhancing colours is most commonly mentioned as the main reason to get a polariser