Alley in Pisa, Italy

by Lars Kotthoff

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

0
votes
1answer
71 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 ...
6
votes
3answers
407 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
219 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
118 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
86 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
140 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
293 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
847 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
201 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
135 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
2answers
384 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 ...
7
votes
3answers
795 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
2k 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
676 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
192 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 ...
5
votes
3answers
2k 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 ...
10
votes
4answers
3k 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
277 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 ...
2
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
381 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 ...
4
votes
1answer
266 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: ...
6
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
119 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
4k 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 ...
12
votes
1answer
206 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
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 ...
8
votes
5answers
983 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
551 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
291 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 ...
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 ...
12
votes
3answers
3k 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 ...
22
votes
9answers
2k 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
616 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 ...
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?
31
votes
5answers
3k 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 ...