I took these the other day for this specific example- I get a lot of questions about filters, particularly polarizers. Typically these questions suggest that the photographer may not understand what a polarizer is and what it does. Below are images with and without a polarizing filter, the exposure (1/3, f22, ISO 100), lens and camera are the same.

If you are unfamiliar with what a polarizer does…what do you see? What are the differences? When, therefore would you want to have one?