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The benefit is no/less vignetting pending filter depth. They cost a lot more and you can't put a lens cap on them.
Posted 46 months ago.
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For the Sigma 10-20, there is no benefit with most thin-profile filters but CPLs may be a different story. I honestly don't think most high-quality normal-profile CPLs will cause vignetting issues as long as you don't stack... but you really shouldn't be doing that anyways. If you need to stack then move away from threaded filters and go to plates such as the Cokins system.
Posted 46 months ago.
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I use a Hoya Pro1D CPL on my Sigma10-20. It's relatively thin, not such that it can't use a lens cap, but thin enough that there's no major vignetting at 10mm wide open. However, I find it really hard to take off because it's so thin.
Posted 46 months ago.
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For the Sigma 10-20, there is no benefit with most thin-profile filters but CPLs may be a different story. I honestly don't think most high-quality normal-profile CPLs will cause vignetting issues as long as you don't stack... but you really shouldn't be doing that anyways. If you need to stack then move away from threaded filters and go to plates such as the Cokins system.
Unfortunately the P-Series vignettes at 10mm or you use the single filter holder doesn't take a CPL so a thin CPL + the wide angle cokin P series is the only way.
Why shouldn't you stack filters by the way?
Posted 46 months ago.
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Nope, unless you stack filters, however, why would you stack filters?
I suppose ND/Grads but you would use a cokin or similar system for this and a wide angle filter holder. I personally don't stack filters and use a regular Kood CPL which works just fine with no vignetting.
Posted 46 months ago.
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I just bought a non low profile 77mm so I wouldn't have to keep using my 77mm low profile with adapter on my 18-200VR.
I think when I get home this evening I will take some test shots and compare the low profile to normal.
Posted 46 months ago.
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Paris Steve says:
Unfortunately the P-Series vignettes at 10mm or you use the single filter holder doesn't take a CPL so a thin CPL + the wide angle cokin P series is the only way.
That's why you use Z-series on UWAs. Yes, it is a lot more expensive.
Why shouldn't you stack filters by the way?
Well, primarily because you want to avoid putting on unnecessary glass as much as possible. Many people will leave a permanent protection filter on and then simply throw a polariser on top of that because they're too lazy to remove the clear filter. This adds the possibility of more flaring and image degradation due to the additional layers of glass. The other reason is as mentioned the increase chances of vignetting. But there are times when you must stack because you're trying to achieve multiple effects at the same time such as say split gradient and polarising. Manufacturers do make combination filters which try and combine two effects into the same piece of glass. Such is the case of a moose filter which combines a warming filter effect with a polariser.
Posted 46 months ago.
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You'll loose polarisation regardless of what type you use, round the edges of the image if you go beyond 13mm on this lens.
Polarisation occurs when the element of the filter works to achieve a parrallel source for light rays entering it and is at its greatest when the light source is at 90 degrees to the filter.
However the field of view of this lens goes beyond that so what you get is a marked falling off of the polarisation round the periphery of the image when the field of view is larger than 90 degrees.
Its not always visible in the viewfinder, and it has a tendency to appear as either light or dark areas round the edge of the image
Posted 46 months ago.
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go with the normal cpl, they are cheaper. Be careful when using for skies very wide, as already stated.
Posted 46 months ago.
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Good example of 'loosing' polarization, note how dark the top left corner is versus the top right corner
Posted 46 months ago.
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Thankyou very much for the replies.
I bought a Sigma 10-20 yesterday but in the event held off from buying a filter. So far very very pleased with the lens :oD
My observation is that looking at the lens over the edge of the lens hood, there looks like a fair bit of room for a filter ring to stick out before it sticks out into the field of view further than the hood.
Attaching the lens hood - Ah I hadn't thought of that at all, my lens came with a centre pinch lens cap (I read somewhere the lens cap was edge pinch to get it off and was a pain with the hood on).
Stacking filters - I once tried stacking two CPLs as an adhoc variable neutral density filter to take a long exposure on a sunny day - basically works and was a fun experiment but I'd rather have the proper filters of course.
Change in polarisation effect across a wide sky - Brilliant example pic mmikee, thanks for posting that.
Buy cheap CPL - I suppose we need to define 'cheap', but I bought some <$5 CPLs from HK and they did have a polarising effect they'd shut down the light from my laptop screen to nothing, but they also gave a yellow or blue cast to the image - awful! I have settled on lower end (less than £80 GBP) Hoya filters as my level of spend on filters.
Thanks again, great community
Posted 46 months ago.
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Is the vignetting just from the filter ring getting into the field of view, or is it also partly that the light physically is going through more filter at the edges?
Originally posted 46 months ago.
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Arthr edited this topic 46 months ago.
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filter vignetting is caused by the filter coming into the image. though the ultra-wide lenses tend to lose a wee bit of light at the corners to start with. but this just causes a slight darkening of the image rather than having the corners 'cut off' by the jutting out filter.
Posted 46 months ago.
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I use a regular Hoya CPL - the thick type - no vignetting noted.
Posted 46 months ago.
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Ok get some shots up comparing thick and thin CPL's against no CPL here
Posted 46 months ago.
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just checked out your link and....
I see no vignetting!
One thing you should mention though is what brands of CPLs you are using, for reference sake
Posted 46 months ago.
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Hoya pro1 digital, 10mm @f8 perfect to me.
Posted 46 months ago.
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Gothic666: the sun was just behind you. IMHO the shot looks ok as there was no or very little polarisation effect. Am I right ?
Most of my pictures with a polar on 10mm looks quite bad.
Posted 46 months ago.
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Exactly. The polarizer does not work at zero or 180 degree angle. The edges are significantly darker than the cener at a glance. I wonder if this vignetting is caused by the filter? Since the polarizer also works as ND filter at any angle, the light at higher angle goes through a thicker layer of ND glass and this may cause vignetting.
Posted 46 months ago.
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FWIW with a cheap normal profile CPL and a Cokin wide angle holder I have to zoom out to 12mm to avoid vignetting, no great difficulty and I usually use one or the other which gives no vignetting at all at 10mm.
Posted 46 months ago.
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 fe64970103 My shadow says you are right :-)
However Hoya doesn't give any usage informations on the website
www.hoyafilter.com/products/hoya/pro1d-04.html
Looking at my photo you can't see sun reflections on the water on the left side or an overexposed sidewalk. The day was very sunny and hot and i'm sure exposure and colors wouldn't be so good without a CPL imho
Posted 46 months ago.
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just ordered a B+W 77MM Circular Polarizer Slim Mount Multi Coated Filter so I'll report back after i get it
Posted 46 months ago.
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Hi.
Here is a sample picture made at 10mm with a "B+W 77MM Circular Polarizer Slim Mount Multi Coated " (LostInInaka it works without vignetting :) ).
You can clearly see the uneven polarization effect. It really depends on the conditions on the filed but in certain cases the final result is very ugly with a very dark part on one side and a very bright part on the other side. As for reflections I managed to took shots of sea where reflections were removed just on one side of the picture.
I'm not taking about vignetting due to the thickens of the filter but here we are facing uneven polarization effect due to the wide angle and you won't get rid of it regardless of the filter used.
Take for example the Nikkor 14-24 lens which is considered a pro wide angle lens (note 10mm is equivalent to about 16mm on a full frame sensor) This lens is not meant for mounting a screw-in filter as it doesn't have the space for it (It doesn't have the hole for mounting the filter).
To conclude. I have bough a polarization fileter for my siggy but I find it usable just in certain situations. In most of the cases on bright days it just produces very uneven results.
Posted 46 months ago.
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GREAT! thanks for the heads up!
Posted 46 months ago.
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@ LostInInaka:
Just got me the B&W slim cpl aswell. Very nice filter!
Downside is that it can't take a clip-on lenscap.
The cap that comes with the filter is has a big design flaw. It falls off after the slightest touch. Very bad design,
Solution to that problem: keep the lenshood on. this way the filter doesn't fall off.
Still I find myself walking around with the camera in the hand and one finger on the lenscap, keeping it in place.
Regarding the CPL it self -and the 10-20-: I have not had the opportunity to test it yet, esp due to the bad weather.
Enjoy the beautiful B&W filter!
Posted 46 months ago.
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Vignetting at 10mm from Hoya CPL:
 -- from hypnogogia - (?)
Originally posted 46 months ago.
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hypnogogia edited this topic 46 months ago.
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Aar☆n [deleted] says:
Hoya Pro 1, almost no vignetting @10mm/f14, this is even stacked with a Hoya Pro 1 UV:
Also you CAN use a lens cap with the PRO1 CPL, its not very tight but it does stay in there,
Originally posted 46 months ago.
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Aar☆n edited this topic 46 months ago.
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In this pic the sun is rising behind me and I am getting surface reflections from the sky in front.
Would a CPL filter help in this instance to cut the surface glare?
So is the oft stated CPLs work best at 90 degrees to the sun only true when dealing with getting a nice blue sky, and is not true for cutting reflections from water?
Originally posted 46 months ago.
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Arthr edited this topic 46 months ago.
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I'm thinking that with reflections the direction does not matter. I don't know that for sure but it seems any water shots I take I can always remove the reflections with a polarizer.
Posted 46 months ago.
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There seems to be no definite conclusion here. ...
Posted 30 months ago.
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Simply speaking...no advantage in using a "thin CPL" unless you are in the habit of stacking various filters. I use a Kood CPL which works just fine.
Posted 30 months ago.
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@coneheadkeef.
very nice. ty.
Posted 30 months ago.
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mmikee: Thanks for the test with no cpl, think and thick. I saw no differnce. BTW, I did notice that the comments in our blog deal a lot with the blue pill. :)
Posted 7 months ago.
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I've been getting vignetting between 10mm and 12mm with a polarising filter. The shop warned me about it and offered my a thinner filter but I am really not bothered. In some cases I have deliberately allowed it to happen as I like the effect.
Posted 7 months ago.
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On the Sigma 10-20 F4-5.6, haven't found any vignetting with regular thickness, but that could vary with make of filter. If you stack filters, then for sure you will get some vignetting, and catch the corners. Most makes of UWA lenses require the thinner filters, luckily with the slower Sigma you can get away with the less expensive thicker filters.
Originally posted 7 months ago.
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photobuf edited this topic 7 months ago.
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