X4 CPL 46mm Circular Polarizer Filter - Schott B270 - MRC16 - Nano Coating - Weather Sealed - 25 Year Support by Breakthrough Photography

So this is a 2 for 1 filter its a circular polarization and a true ND 6 stop filter so no more stacking filters or having filters stick together or not working right ..so for the price i think its justify i used it on a tamron 10-24mm wide angle lens with no issue.. you can do what i did buy it try it for a week then see if it worth it or send it back and get your money back .. and i ended up keeping it... Now they are markings or symbols around this filter beside the normal triangle mark this is a guide for you so when you are using this horizontal and turn the polarizer to get the effect you wont look at one of the marks.. just incase you wont to shoot vertical or move to another spot to reframed your shoot you can use this to get the filter back to that spot that you had it before

Excellent!

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It works ver smooth.

So far very impressed. As advertised, color neutral, at least within bounds of what you might change in Lightroom anyhow. What I really like is the mounting threads. So smooth, and then the filter spins freely. Nice finish, a little pop of color. Just a well made product. Buy once cry once if you want quality.

Wow! I guess I got suckered by all the positive reviews.As one reviewer noted, however, this is not a CPL filter. It is a straight-up linear polarizing filter. This was verified with both the mirror test and by looking at an LCD screen. I double-checked that I'm not making a mistake with one of my Hoya EVO CPL filters, and it passed both tests while the Breakthrough X4 CPL filter failed both tests. Hard to give it credit for being only 1-stop darker (verified) when it's not a CPL.Beyond that, the construction is nice, and it rotates smoothly. The markings are somewhat useless/confusing, and they could have some up with something better than hieroglyphics. In the end, I just used my finger position and rotated it 90 degrees.The red ring also seriously looks like anodized aluminum. I found it AWFUL to remove the filter, and it jammed badly against the Breakthrough X4 UV. Adding/removing a CPL easily is a must when changing light conditions. My Hoya EVO CPL filters are such a breeze to remove (and are slightly thinner). This is because the tiny ridges on the Breakthrough mount ring are basically flush with the turn ring. Ironically, I found myself loosening the filter while turning the filter clockwise (as I'm looking). The Hoya has the turning ring at a slightly smaller diameter, so it's easy to feel which is which and also easier to grip the mounting ring when you need to. Lessons to be learned here. I rotate or install/remove my Hoyas effortlessly without even thinking. This Breakthrough takes 5X longer, much more concentration, and binds/jams so bad that I just leave it until I could get inside and set it down. Ease-of-use sucks.The packaging seemed a waste, too, although the filter arrived clean. There's weird stickers here and there, and some of them coming off and stuck to other things. Not impressed with the packaging but not that I really care. I would have preferred a more practical travel case like the old school clear twist-lock ones.I might try one of the Chinese magnetic filters (and pray the optics are not awful) or just go back to Hoya EVO or HD3.

I have purchased Breakthrough Photography products in the 82mm, 77mm and 72 mm filter range (CPL, Dark CPL, and Neutral Density).I think the product is high quality. I am a Nikon guy and almost exclusively purchase Nikon products. Also, all my lens wear a Nikon NC filter. My choice to keep the NC filter clean and minimize touching the much more expensive lens.I am currently on a 5.5 month trip to the Philippines and Thailand and thought I would bring along various Breakthrough Photography filters and see if I noticed a difference from my Nikon filters. Equally important, to my knowledge Nikon does not offer the 'dark CPL' type filter.My experience: excellent filter, easy to clean and does the job it is supposed to do. When compared to similar Nikon products I do not see a major difference but (to be fair), I am only looking at my photos on my MacBookPro so I will not be able to do take a better look at comparisons until I return to the USA.What I do NOT like: the Breakthrough filters get 'bind' to my Nikon NC filter. I can NOT unbind them. I have tried filter clamps (a waste of money and time). I have removed the 'set' and used as much force as I dared to try.What has worked for this ridiculous situation. I leave the bound filters in the sunlight in my hotel room window for a while. Most of the time once the filters have heated up I can pry them apart (by unscrewing them). But out in the field I have never been able to get them apart.My next strategy is the because of this problem I place another Nikon NC filter on my lens (I have spares). I then just let the two filters that are 'stuck' to each stay stuck to each other. When I do not need a CPL type filter I just remove both the filters and replace it with a single Nikon NC filter.This situation is annoying but I do have a work around.I have also tried to 'loosely' connect the CPL lens -- this approach does not work. When I have adjusting the CPL directivity the entire filter also turns. And given the significant cost of the Breakthrough filters I do not trust that it won't just fall off and break at some point.Recommendation: I do like these Breakthrough Photography filters. I wish the engineering staff did a better job of periodically placing some type of minor extensions along the gripping part (knurled edges) of the lens so you can actually get a grip on the d@mn filter to apply some torque to remove it. This is probably a problem in itself due to placing lens hood.An alternative is to provide an actual grip device (like a filter clamp) that is specifically designed for this product line. An OEM provided tool (should hopefully have) gone through quality control such that it 'perfectly' fits the Breakthrough Photography knurled edges.

Great polarizer!(For those who thinks it doesn’t work, it doesn’t reduce light as much as cheaper ones, so it *appears* to be “not working”. Try standing in front of a mirror with the polarizer and flip it around a few times and you will see in the mirror that it is blocking light just fine.)Like other polarizers, it is quite thin, and not trivial to get back off your lens unless you use a rubber band around it to get a good grip. Before you say it, yes, I agree, they should provide that with the filter (and probably with GND filters too).Check the results with and without the polarizer in water, sun at a cross-angle to you, snow, and so on. You will be very pleased with the results!