Tagged Questions
1
vote
1answer
68 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 ...
1
vote
2answers
158 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 ...
5
votes
3answers
281 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
793 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
397 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
150 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
824 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 ...
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
223 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
601 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
266 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 ...
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:
...
5
votes
3answers
609 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, ...
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
856 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
232 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 ...
15
votes
3answers
985 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 ...
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
616 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 ...
