Just received a new toy. It's the Singh Ray Vari ND Filter. It has the potential to make noon fun again for taking shots. It works a bit like a circular polarizer but does not change the color. By slowing the light entering by up to 8 stops, it allows you to take more advanced long exposure shots during the day, or to extend time during night shots. Because I am using on a Canon 5D Mark II, I was aware that it will vignette on wide angle. That's due to the high quality of full size lens that are used. Not a major problem, I noticed it a bit at 24mm but you can easily adjust when shooting for a crop. At $390 (for the thin filter) it is a bit too pricey but everyone raves at their quality and it is an impressive bit of technology. They have a new DUO model with a polarizer added in also, but thought that might be pushing extra glass too much for my camera. There is a little less expensive standard size that probably will vignette a little more than the thin version, but has a screw in adjustment on it for other filters. The thin model I got, doesn't allow add on's. Still learing but so far I have been very impressed. Here are a couple of shots I took the first day. One is a noon 15 second shot in San Francisco (the rocks), the other is a sunrise on the bridge that was only about 1.5 seconds. If you get addicted to long exposures of water (easy to due) it is a wonderful tool.