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

learn more… | top users | synonyms

-3
votes
0answers
40 views

suggestions on a polarizing filter? [duplicate]

I am set on getting a polarizing filter and have done enough homework to know I need it to be circular for my dslr. I have picked up that i can get a 5$ step up ring and get a filter for my larger ...
1
vote
0answers
75 views

Recognize dry areas by separating diffuse and specular reflections [closed]

This is a machine vision/imaging sort of a problem where we wish to detect dry areas on mostly wet surface. In order to reliably do that we'd like to optimize the imaging side of it. At the moment ...
1
vote
1answer
104 views

Add an orientation mark to a polarizing filter's rotating ring

I love the effect a polarizing filter can have when used appropriately; less so the need to rotate the filter around to work out its current orientation. I like the idea of adding a clearly visible ...
0
votes
2answers
123 views

While stacking filters, can polarizing filter be placed behind ND filters?

I have a ND filter (10-stop, 100mmX100mm square size) with a filter holder. The filter holder (similar to LEE or Formatt-Hitech holders) connects to the camera with a screw-in adapter (77mm and ...
2
votes
2answers
296 views

What do I need to know about using a polarizing filter at night?

I am into night photography, and am looking at buying a polarizing filter. What particular advantages and challenges are there to using a polarizing filter at night? reflections from light on ...
0
votes
1answer
88 views

Using a linear polarizing filter with a DSLR [duplicate]

Can I use a linear polarizing filter with a DSLR camera in manual mode?
0
votes
1answer
82 views

Which polarizer is better [duplicate]

I have been looking at get a polarizer and some nd filters for my sigma 50mm art lense. From my research, it looks like the best are B+W and Hoya. Does anybody have any experience with either brand on ...
3
votes
2answers
533 views

how to use a circular polarizing filter [duplicate]

I am testing out a B+W 49mm Circular Polarizer filter, but there is no marking, or indication where the starting position supposed to be. If the filter is supposed to be turned to turn polarization ...
0
votes
1answer
161 views

Why does the use of multiple filters create vignetting?

Recently I have had vignetting problem with my Sigma 18-200mm f/3.5-6.3 DC OS HSM (72mm) After checking, it is specified in the manual that one should not use multiple filters or thick filter (as ...
0
votes
1answer
150 views

Usefulness of a Broken Polarizing Filter

I picked up my camera bag a few days ago, which was not zipped shut. Out fell two of my lenses. In the process I broke the focus motor on one lens and cracked a Hoya HD polarizing filter on the other ...
2
votes
2answers
689 views

Can looking at a computer screen show the difference between linear and circular polarizing filters?

About the difference between linear and circular polarizing filters (quite well developed on this Q&R): What is the effect of placing those filters in front of a computer screen? I have seen two ...
5
votes
3answers
229 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 ...
6
votes
3answers
450 views

Do I need a polariser for winter sports?

This will be my first year taking my DSLR to the slopes, I want to get the best pics possible. I have thought for a long time that the main thing I would need is a circular polariser to eliminate ...
1
vote
2answers
349 views

Can a circular polarizer filter cause noisy images?

I am using a Canon 450D with 17-85mm Canon lens. I noticed that the image is very noisy when I use my CPL filter. Is my filter bad quality or is this normal? I notice this especially when I take RAW ...
-1
votes
2answers
134 views

Polarizing filter [duplicate]

I am new in photography. I am planning to buy a "Polarizing filter" for my lens. Actually, I know very little about this filter. So, I am not sure, does it really necessary to take good color ...
0
votes
2answers
106 views

Homogeneity of a filter, when does it matter?

I read a review of circular polarizing filters in www.lenstip.com and one of the tests is to judge the homogeneity of the filters. Quote from the test explanation page: Homogeneity is a ...
3
votes
3answers
183 views

How do I keep a polarising filter from coming loose?

I've got a certain lens + filter combination that won't work well together. My polarising filter keeps coming loose when I rotate it. Is there a trick to keeping it attached, like putting something ...
2
votes
2answers
455 views

Is it possible to safely disassemble a polarizing filter?

I just purchased an Hoya PL-CIR filter off craiglists (I'm starting photography and it was cheap) and it looks like there is some dust/dirt between the two lenses. Is there a way to safely ...
10
votes
5answers
960 views

What is causing this extreme glossy effect when using a polarizing filter?

I have noted a few times at car shows and events when processing my images that some have what i can only call an extreme gloss effect - OK this car was shiny, but the image looks very striking and ...
3
votes
2answers
328 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 ...
2
votes
1answer
185 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 ...
3
votes
5answers
3k 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
1answer
105 views

Why do some polarizers transmit more light then others?

How do filters such as the Singh-Ray LB Polarizer transmit more light then other circular polarizers? I am particularly interested in this technology because they claim to only add 1-1/3 stop to the ...
2
votes
2answers
552 views

Are neutral density filters or polarizers better for a desert environment? Or another filter?

Desert environment includes actual desert, some water (yes, I said that), some (dusty) city scenes, some POSSIBLY shiny buildings and pools of water. The research on this suggests that ND polarizers ...
4
votes
1answer
384 views

How does a circular polarizer affect the “stars” from strong lights at night?

When taking night photos at narrower apertures strong light sources such as streetlights demonstrate a star effect based on the number of blades in the lens' aperture. What effect would a polarizer ...
3
votes
2answers
944 views

What type and size of polarizing is needed for a Canon Rebel T4i [duplicate]

Possible Duplicate: How do I find the right size of filters for a lens? I am in the process of buying a new camera. I am getting 18-55mm lens and a 55-250 lens what size of polarizing lens ...
7
votes
3answers
1k views

How can I fix a sticky polarizing filter?

I took a gamble and bought a used B+W Circular Polarizer off eBay. The filter looks great but the adjusting ring is a little bit sticky. Is there some way to lubricate this?
2
votes
1answer
3k views

How do Rodenstock filters compare to B&W, Heliopan, and Hoya HD?

I am looking for a good filter for my 67mm thread lens. I have good experience with the Hoya 8Layer HD cir-pol filter and I really like that it is not as dark as other filters, but it is very ...
8
votes
3answers
852 views

Circular polarizer in underwater photography?

Today, I was watching a underwater video and suddenly asked myself if anyone has used a circular polarizer or polarizer in underwater shots or videos? I searched on the internet but nothing ...
3
votes
1answer
311 views

What kind of special effects can be created using polarizing filters?

From what I have read so far (this question in particular), CPL filters are good for darkening skys and improving image contrast by cutting down unwanted reflections. Apart from this, for some ...
5
votes
2answers
375 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, ...
3
votes
1answer
205 views

What are the benefits of a multi-coated CP filter over a regular CP filter?

I would like to purchase CP filters for at least 2 of my lenses. I can go with either the lower cost regular CP filter or the HMC Multi-Coated CP filter. THe multi-coated filter is almost double the ...
8
votes
3answers
3k 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 ...
1
vote
1answer
230 views

Is there such a thing as a filter for circularly polarized light for photographic use, and what would be the effect of using one?

I was under the assumption that a circular polarizing filter would filter circularly polarized light. I now understand that what is commonly called a circular polarizing filter only filters based on ...
11
votes
4answers
5k 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) ...
5
votes
2answers
295 views

Why are doubled polarization filters as continuous ND not popular? [duplicate]

Possible Duplicate: What is the difference between using an ND filter versus 2 polarizers? One thing I was always wondering when it comes to ND filters is why there's need for such a large ...
3
votes
3answers
1k views

Would a polarizing filter help get better images from a security camera pointed out a window?

I'm evaluating some security cameras for home use. To avoid vandalism, I'm probably going to have to position the cameras inside the house, facing out the windows into a not very intense southern ...
3
votes
2answers
434 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 ...
12
votes
3answers
2k views

How to photograph a snowy landscape?

I am about visit Nepal for 8 weeks, planning to trek the Annapurna circuit, Everest Base Camp and Imja Tse. Most of the landscape is extremely bright and snowy. Credit: Gianni Scopinaro How do I ...
4
votes
1answer
282 views

What do all the polarizing filter acronyms mean?

I was shopping for a decent polarizing filter for my camera, but I got confused by all the acronyms and the variance in prices. For example in B&H stores, you can filter by Polarizer Combination: ...
4
votes
1answer
506 views

How to prevent weird spots and stripes on photos of window glass?

A few days ago I took photos of a nice curvy business center in another city. Later I discovered that many frames had weird artifacts on the glass, shown below as 100% crops. An almost normal shot: ...
7
votes
3answers
1k 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 ...
2
votes
2answers
124 views

Is this a good polariser and is it for an appropriate price?

I'm thinking about purchasing Hoya HD 58mm Circular Polariser and I was wondering whether it's a good choice and also whether it's for an appropriate price. What do you guys think?
15
votes
7answers
6k 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 ...
13
votes
1answer
225 views

Is it normal for a small portion of a polarized lens filter to appear unpolarized?

Just picked up my first polarized lens filter from Tiffen — a 52mm SR Polarizer. It looks like a small portion of the lens is NOT polarized, but this being my first lens, I wanted to confirm this ...
3
votes
4answers
3k views

Should I choose Hoya HD CP or Nikon CP II polarization filters?

I am looking for a polarization filter for a couple of my lenses. I have heard great things about Nikon CP filters and I am using Nikon NC filters myself on some of my most precious lenses. However, ...
13
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 ...
8
votes
3answers
3k 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 ...
13
votes
5answers
557 views

Why don't today's lenses come with a polarizer by default?

As I am now looking for a decent polarizer for my 18-105mm and 50mm (Nikon D80) I realized how important they are for outdoor photography. So why aren't they directly hard-mounted on every modern ...
4
votes
3answers
316 views

What is a source for small pieces of thin, high-quality, polarizing film for use with rear-filter lenses?

I have some pieces of polarizing film from polarization.com, which are reasonably good and not too expensive, but I have some problems with them: They are too thick (only just fit in the filter ...