Excerpt: This filter fits perfect and does the job and keeps the blues to a minimum when Im just inside the shade but shooting into bright sun. Great for non sky pics, and protects the big 86mm glass on my Sigma.
Pros: Compact, Easy to Use, Great Picture Quality, Lightweight
Summary: This filter resolved a major problem with my telephoto lens. I had purchased it second hand and it had come with a cheap off brand C PL filter which was causing auto-focusing difficulties. Once replaced with this filter the focusing cleared up.
Excerpt: I bought this as a protective filter for my Sigma 150-500mm. From what I have been reading I haven't decided to actually use it on the lens yet or not (for optical reasons), but I would like to carry it with me. I suppose filters this size don't come with those cute plastic cases, so here it sits on my desk after about a week because I can't find an efficient container to carry it in my kit with. The price was good.
Pros: Easy To Use, Firm Mount, Less Expensive Than Some
Excerpt: When I bought my long lens, I thought I would buy a filter eventually, boy after one shoot did I ever find out that I waited far to long. I let price get in the way of great pictures. That will never happen again.
Pros: Clear Optics, Easy To Use, Firm Mount, Strong Construction