Spring 2012

Spring 2012
by ani

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

learn more… | top users | synonyms

30
votes
3answers
2k 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?
34
votes
5answers
6k 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 ...
24
votes
10answers
5k 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 ...
16
votes
3answers
3k 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 ...
15
votes
9answers
8k 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 ...
8
votes
3answers
4k 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
4answers
7k views

Screw-in or square filters in the field?

I currently carry a circular polarizer and a screw-in 4X ND with me in the field. I've decided it's time to upgrade my filters, because there are too many times when I really need an 8X ND (or more) ...
11
votes
5answers
6k views

Is it wise to use polarizing filters with wide-angle lenses?

I've been looking into whether to use a regular UV or polarizing filter for a 16mm wide-angle lens and have found that a large number of people believe that you should never use a polarizer with a ...
9
votes
3answers
5k views

Is it worth buying an expensive CPL filter over an e-bay cheap one?

I have already got a circular polarizer filter (CPL) filter for my canon EF-S 18-55mm and it is working fine, although the quality goes down a bit compared to when I don't have the filter on, but its ...
3
votes
2answers
580 views

Do I need a slim or normal polarized filter for a Tokina 11-16mm wide angle lens?

I have a Canon T3i body and I recently bought the Tokina wide angle lens for landscape and astro-photography. I am looking to buy a polarizing filter, but I'm not sure if I should get the slim or the ...
14
votes
1answer
2k views

Can the effects of a polarizer be replicated in post-processing?

According to my knowledge Polarizing filters are mainly used to make sky appear more bluish in the day sunlight which gives more dramatic effect to your pictures. I don't have polarizing filters yet ,...
13
votes
3answers
6k views

What are the consequences of stacking a circular polarizer on top of a UV filter?

The reason I'm asking this is that I don't have a circular polarizer yet and I'm planning to buy one. I know I'll be too lazy to unscrew the UV filter to put on the polarizer. I'm wondering whether ...
14
votes
0answers
624 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 ...
2
votes
1answer
150 views

Gel circular polarising filter

I am contemplating buying a lens that only takes rear gel filters. Is it possible to buy a circular polarising filter in gel format? If so, who can supply them (preferably UK based)?
7
votes
3answers
2k views

Is it possible to use a polarizer and a ND filter at the same time?

Is is possible to use two filters (one polarizing and one ND) at the same time on a 18-55 kit lens from Canon. I am new to photography and wanted to work with filters. Do you suggest me buy these ...
5
votes
2answers
466 views

Product shot of a vase with decals: reflections obscuring decals

I'm having trouble getting a good photo of a round base vase. It has a shiny round bulbous base with a decal which is being obscured by reflections. I've tried using a number of lights, umbrellas, ...
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 ...
9
votes
4answers
366 views

Circular polarizer works great at shorter focal lengths, but significantly degrades the image at longer lengths. Why?

I bought a cheap CP recently to play around with, and noticed an interesting phenomenon: Using it with my 24mm lens on full-frame, images turn out tack-sharp - there is hardly any difference in ...
6
votes
3answers
275 views

How does a polarizing filter work?

I know what a polarizer does to the light, and how it works technically (filtering out some of the oscillation directions of the electromagnetic radiation), and also how this affects pictures (...
3
votes
6answers
6k views

Is there any reason to place polarizer filter before ND graduated one?

Is there any reason to place polarizer filter before (the first in stack) ND or/and ND graduated one (for example as we can see on Lee 105 mm ring)? Is there any technical reason to do that or it's a ...
3
votes
2answers
482 views

Are these ghost light spots and vertical grain indication that my scratched polarizer is ruined?

Earlier, I unfortunately dropped my polarizer. There doesn't seem to be any damage save for a light scratch which I've uncovered only after a very thorough inspection. Nonetheless, I'm worried that ...
2
votes
1answer
276 views

Polarizing filter causing soft, hazy shots?

I'm having a problem with a polarizing filter that's I've used for years. I have a Nikon D7000 w/18-200mm lens. I keep a UV filter on the lens, and on occasion I add a circular polarizer, which just ...
2
votes
1answer
345 views

Circular Polarization and Passive autofocus [duplicate]

Couple of weeks ago, I was assigned a homework in one of my Applied Physics master's course. My professor asked to explain why passive autofocus works only with circular polarizers. I am not a very ...