a type of filter used to reduce oblique reflections and increase color saturation
1
vote
1answer
73 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 ...
2
votes
5answers
158 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
92 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 ...
1
vote
2answers
166 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 ...
3
votes
1answer
150 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
224 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 ...
5
votes
3answers
289 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
0answers
806 views
How does 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
400 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 ...
2
votes
1answer
198 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 ...
4
votes
2answers
233 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
152 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 ...
3
votes
3answers
830 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
196 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 ...
8
votes
4answers
2k 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) ...
4
votes
2answers
225 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 ...
1
vote
3answers
606 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
267 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
1k 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 ...
3
votes
1answer
216 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
313 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:
...
5
votes
3answers
623 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
108 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?
12
votes
7answers
2k 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 ...
11
votes
1answer
172 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
2k 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, ...
12
votes
1answer
892 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
1k 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 ...
8
votes
5answers
860 views
long range canon lenses
Currently I have a 7D and 2 lenses: a 18-135mm f/3.5-5.6 IS - which I use as a general purpose / go around lens - and a prime Sigma 30mm f/1.4 - mostly for concerts: indoor, low light scenarios (given ...
13
votes
5answers
534 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
233 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 ...
6
votes
4answers
1k 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 ...
15
votes
3answers
993 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 ...
9
votes
4answers
654 views
Where can I find comparisons for linear polarizers (for a cheap variable ND filter)?
Does anyone know of any good comparisons for linear polarizers, similar to the excellent circular polarizer test done by LensTip?
Unfortunately, a number of those manufacturers don't offer the same ...
12
votes
3answers
2k 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 ...
19
votes
4answers
1k 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 ...
14
votes
0answers
610 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 ...
14
votes
5answers
3k views
What should I look for in a polarising filter?
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 ...
23
votes
3answers
621 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?
28
votes
5answers
2k 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 ...
