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a type of filter used to reduce oblique reflections and increase color saturation

learn more… | top users | synonyms

27
votes
3answers
1k views

What is the difference between a linear and a circular polarizer?

When I bought my polarizer, a friend told me that I should get a circular one, because the linear ones can mess with the autofocus. Is this true? What should each be used for?
33
votes
5answers
4k views

In which situations should I use my circular polarizing filter?

I received a circular polarizing filter as a gift, but I have a hard time determining when I should be using it. I've done river shots with some success, but other than that, it doesn't seem to do ...
22
votes
9answers
3k views

How do I choose a polarizer?

It was suggested that I should get myself a polarizer filter to get over my reflection problem. ( How to avoid reflection when taking a picture of a ceramic object with a shiny glaze? ) I found out ...
15
votes
7answers
5k views

What is the difference between using an ND filter versus 2 polarizers?

I know what an ND filter does. I know what a polarizer does. I also know what two polarizers stacked together and rotated properly do. So the question: why should I use an ND filter to achieve a ...
16
votes
3answers
2k views

How does one use circular polarizers?

I just purchased my first circular polarizer. I have read the thread here about when to use it, but I still have a question. How to use it? A friend told me to spin the polarizer until the sky ...
8
votes
3answers
2k views

Why does a linear polarizer work as well as a circular one on a P&S camera?

I have just purchased a Canon SX30 IS and though extremely happy with it I will need to use a polarizing filter due to the fact that I am travelling to Indonesia to do volcano photography/landscape ...
14
votes
0answers
618 views

Is it possible to use two polarised filters to create a variable ND filter? [duplicate]

Possible Duplicate: What is the difference between using an ND filter versus 2 polarizers? I was reading that by attaching two polarised filter we could create a variable ND filter. Has ...
16
votes
0answers
4k views

What should I look for in a polarising filter? [duplicate]

I am wanting to invest in a polarising filter for my camera (a Canon T2i/550D). What sort of things should I be looking for? What differentiates a good polariser from a bad one? Are there any brands ...