This lens filter is fanatastic!
It doesn't add anything to the current lens on my Nikon D40 SLR.
But it provides the best protection for the lens, keeping dust and other particles from affecting the lens.
It saved my lens recently on my last trip, as my camera bag took a tumble, with the SLR inside.
The lens filter cracked, but my lens was safe and sound.
The only problem was trying to finding a camera store, which was able to remove the damaged filter.
You definitely need a filter wrench to get the filter off.
In the end I was able to find a nikon repair store, who were able to remove my smashed filter.
I would definitely recommend this product and will be purchasing another one, to replace the one I lost.