This question already has an answer here:
There are some similar questions like What is the difference between a linear and a circular polarizer? but I am thinking of a comprehensive list of the pros and cons of the two types of filters.
- Can be used as a variable ND density filter when combining two of them.
I am asking this becouse I have not used a circular one, and I am not sure how effective is to reduce reflection on glass for example, so there can be some categories on the technical aspect, like autofocus issues and the photographic results.
So the question is: What are the Pros and cons of circular polarizer filter vs a linear one?