Summary: I debated long and hard about buying B+W, or Hoya. I had found in the past this was a very important tool to have for harsh bright conditions, or effects you want for the sky (blue). Everyone recommended B+W as top notch. I have found this filter ( and maybe it's just my copy) to be very loose, and I'm never sure if it's in the same position when I set it last, especially if I am active, or on a long hike.
Pros: Fits my lens, Works when I set it
Cons: Expensive, I feel I have to reset it, Rotates too easily
Summary: The price tag may open your eyes, but using this filter will also - it is indispensable when it comes to snow, high-glare conditions or on water, all of which i have encountered - the color saturation is unparalleled (especially on blue skies), and the glass is superb - an investment to be made for a lifetime
Summary: Top of the line filter. Why put a cheap filter in front of your professional quality Canon or Nikon lens (others out there too) when you want a sharp image. The slim filter works great on super wide 16/17mm filters with no cut off of the edges.
Summary: Even in the digital age of photography, you should still have a quality polarizer. Its very rare that this filter is not on my lens, and the solid build and the performance of B+W filters keeps me buying their products.
Summary: I bought the 77mm and some step down rings so I could use this polarizer on everything from my 11-16 to 28-70 to 70-200. It works as it should. The lens cap is fine. It is very tight but can not be removed when a lens hood is on.
Summary: I enjoy using this product on my Canon 70-200 2.8 IS for outdoor photography. B&W filters are built to very high standards. I never worry about image degredation with this brand. The build quality is outstanding and tight. The brass beats the pants off of the aluminum counterparts of other brands.
Summary: I bought this to use on my Canon 24-105 L series lens. Regular polarizers caused vignetting in the corners due to the wide angle. A thin polarizer solves this problem. Be aware that thin polarizers utilize a press-on friction fit lens cap. You can no longer use your regular caps that snap onto the filter threads. There are no filter threads on thin filters. Not a big deal in my opinion, but some people might be bothered by this.