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For Hoya Pol Linear 49mm, 39 customer reviews collected from 1 e-commerce sites, and the average score is 4.6.

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11.12.2018

This filter is indeed a linear filter, and incorporates a double ring. You screw it into the lens and tighten it slightly, gripping the rear ring, and then the direction of polarisation can be altered by rotating the front ring. To fit the 58mm version to my Panasonic GH5 Vario f/2.8 12-35mm lens I had to remove the lens hood which has a bayonet attachment. With the lens hood replaced, I can still rotate the filter by using light finger pressure on the front edge of the ring which is knurled to give grip. The effect of a polarising filter is not small, on a typical blue sky with clouds it is huge, allowing a couple of stops more exposure to be used before cloud detail is lost; that's comparing the optimum angle setting with the ninety degree from optimum setting.In practice you might want to set an intermediate position. At the same time it enhances the contrast of landscapes a little. This is the main use for a polarising filter, though it will also affect reflections off glass and some surfaces, and as another reviewer has commented, it will reduce the inevitable highlights that appear when photographing oil paintings. All polarising filters for cameras are linear and work in this way, but so-called 'circularly polarising' filters have an extra stage added to spin the light coming out in such a way that the autofocus mechanism of some cameras will still work. On the GH5 however, this does not seem to be necessary. The GH5 is also special in not using an optical anti-aliasing filter - most cameras do. So if you have a GH5 this filter is ideal. For other cameras, and to know more, read on:If you are new to polarising filters, then I suggest you read the Wikipedia article, as there's a lot to understand. I was puzzled that anyone would want a 'circularly polarising' filter for a camera, and so I went for this one. It is indeed a linear polarising filter - to test for that you simply hold it up to the sky and rotate it. With the thread towards your eye the sky darkens very noticeably in one position. Turn it so that the thread is away from you and the effect is the same. Do this with a 'circularly polarising' filter and it only works with the thread towards you! The important thing to realise is that 'circularly polarising' camera filters are not circularly polarising filters. There would be no point in this - take a pair of 3D cinema glasses (or any passive TV 3D glasses) and rotate them against the sky and you will get no change. These are true circularly polarising filters, but the so-called circularly polarising filters for cameras are in fact linear ones with an extra layer added to convert what comes out to circular polarisation before it enters the camera. This is because some modern cameras have autofocus systems that do not work with polarised light. My Panasonic GH5 however, seems to autofocus without any problem with this filter in place. This is important to know, because the GH5 is a top camera, regarded by many as the best camera bar none for 4K video, and there is no point adding the extra layer of filtering if it isn't needed as this will only reduce exposure and add to light scattering. It is also said that a linear polarising filter can interfere with the anti-aliasing filter fitted to the imaging chip in most cameras. This 'phase plate' filter is designed to blur the image very slightly, removing high spatial frequencies to avoid the fringing or stair-casing effects often seen on fine textures. Importantly though, the GH5 is unusual in having no optical anti-aliasing filter - instead it uses high-power image processing to reduce the 20Mpixel image down to an 8Mpixel 4k image for video. Earllier cameras such as the EOS5D II suffered bad aliasing because they lacked the processing power to do this.
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31.12.2009

The boring stuffThere are two types of polarizing filters generally available, linear and circular. With the exception of how they interact with some autofocus and metering mechanisms, they have exactly the same effect photographically.Linear Polarizers:The metering and auto-focus sensors in certain cameras, including virtually all auto-focus SLR's will not work properly with linear polarizers because the beam splitters used to split off the light for focusing and metering are polarization-dependent.Circular polarizers:Include a linear polarizer on the front, which selects one polarization of light while rejecting another, followed by a ¼ wave plate ,which converts the selected polarization to circularly polarized light inside the camera, which works with ALL types of cameras, because mirrors and beam-splitters split circularly polarized light the same way they split unpolarized light.What can a polarizing filter do for you? A polarizing filter has two applications in photography: it reduces reflections from some surfaces, and it can darken the sky.The benefits of polarizing filters are largely unaffected by the move to digital media, while software can simulate many other types of filter, a photograph does not record the degree of polarization, so the optical effects of controlling polarization at the time of exposure cannot be replicated in software.
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12.2.2012

Hoya is cheaper and just as good B+W, Tiffen, etc. It is made in Japan and works well in reducing reflections from foliage and water. This is the one filter every photographer must have (including an ND).There are cheaper makes out there - I never touch them and have always stayed with Hoya.I have several for different size lenses and never had a problem with any over many years.The price through Amazon was competitive and the filter was delivered (as usual) very quickly - to Portugal. EBay prices out of China are sometimes cheaper but I stick with Amazon and generally UK suppliers as I know what I am getting.Highly recommended.

8.5.2009

The polerizing effect is good. The filter is easy to rotate.Unlike a linear filter on a conventional film SLR, it is harder to tell what angle gives maximum effect. I think this is because it is a circular polarizing filter, which is necessary for digital cameras.There is a white mark on the filter which should be set to the direction of the light source, the sun usually, but this is only an approximate guide.If like me, you want the maximum effect, then it is hard to judge, especially since my digital SLR takes a moment to display the image in the viewfinder.

7.4.2009

I am very happy with this Hoya polarising filter.It was a bit fiddly when screwing onto my Canon 18-55mm lens but importantly it is well built and makes a clear difference to my pictures. I have taken photos with and without the filter to compare results and see a subtle yet clear difference. With the filter you do get richer colours, especially darker blue skies, and less reflection. You just have to remember to take the filter off when taking shots in poor light!This is a reasonably priced filter that is a must-have for your DSLR camera kit.

25.10.2011

As an relative beginner to DSLR photography I have been doing alot of reading on how to take better photo's. A polarising filter was recommended to reduce glare, reflections and enhance colours.Without wanting to spend a fortune I thought I would try the Hoya. I can confirm this is an excellent purchase.I have compared its effects with that of a Hama filter that my Dad has and the Hoya is 10x better in my opinion.I'm sure there are more expensive filters out there for the pro's but this will suit the majority of amateurs.Great product.

3.5.2009

This was the first polarising filter I have bought so I have no basis of comparison but it does exactly what is required. The 58mm mount fits perfectly onto my Canon 18-55 lens. In bright light, the filter deepens the blue skies and gives clouds more detail. The effect is very prominent - most so at 90 degrees to the sun. The filter can be rotated to allow control over the extent of the effect. Reflection from lakes/ponds can also be reduced.Light entering the camera is reduced by a couple of stops.

8.4.2018

Fantastic! This filter is worth the extra money to ensure no colour cast or abboration. Bought this as well as a couple ND filters to replace the square filters I had. Unfortunately the ND1000 square filter I had gave me a reflection of the lens in all my images and so they were ruined! I didn’t cheap out either, they were Cokin filters so very disappointed. I would absolutely recommend these filters. Hoya is a quality brand with consistency throughout all of their products.

15.11.2013

This is all new to me, Filters. I have just invested in this one and a Cokin filter for dramatic skies, dark and moody. I want to rediscover my love for landscape. I have made the right move, this filter is a good one providing one knows how to use it! l have to read up afterwards several articles on how to get the best from it and how to know it. I do know and usually it is permanently attached, highly recommend this filter as a good stable part of kit.

22.2.2009

Received this product a few days after making a purchase. Product came on time and as stated in sellers description. would deffinitly buy again.Polariser filter has made a big diffrence to my photography and is a must in anyones kit bag. I've used this filter a few times, and because a polariser is a sort of a ND filter also I've used it in nighttime photography where the bright lights would have burned out on my shot. Great product.

22.6.2009

this is a well-made piece of equipment, and at a hell of a good price! i wasn't expecting any less,as i have hoya uv filters and they are of a good quality too. the polariizing filter does what it's designed to do and does it well. it arrrived promptly and well- packaged. sound job!

20.9.2009

I have the Hoya Circular polarizing filter filled to my Canon EOS D400 DSLR camerait reduces glare and increases saturation skies and clouds have more definition. The filter can be turned to reduce glare from different angles Hoya 58mm Circular Polarising Filter

22.4.2013

Great peice of equipment. I used it during my holidays whilst in Florence. The weather was very bright and sunny which could have caused my images to be overexposed, however the use of the filter resulted in me producing beautiful vibrant pictures.

11.6.2017

For Leica q owners (49mm) this does work on the camera, however the depth of the filter is such that it fouls the standard lens hood in Macro mode. It's OK in standard mode. So I returned it for the slimline version. Hopefully that will be fine

30.11.2010

I bought two of these to go with my two Panasonic TM700s. They work very well, whether intended as a polariser or as an ND filter . .which they double as if you want. Good price, good delivery and exactly what I wanted.

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