So after I posted some of my latest shot (which were well critiqued, thankyou all ) I was advised that getting a polarizer might be a good idea. I am happy to say that I am now the proud owner of a Hoya ProDigital Circular Polarizer. Im back out to the bush this weekend but I hvae a question about the filter and that is why does it rotate? It screws in tight but the actual glass is on like a seperate rotating thing. I was under the impression that a polarizer would not need to rotate as it effects the whole image? Also, being retarded I managed to touch the filter and put a mark on it, what would be best to clean it with (just wanna make sure I dont strip an important coating off or something), I have Isopropyl Alcohol which I use for cleaning various things around the house and I have some stuff called "Liquid Fusion" that i use for cleaning my lens (the only reason I haven't used that yet is because it leaves behind a protective layer and I was again worried that this would interfere with the coatings on the filter). Thanks for the help so far, you guys are awesome! PS. Just thought I'd add something else I have been wondering about instead of starting a whole new thread. I noticed someone mention in a thread below me that a lens hood protects from the rain, which leads me to the question, I can use my camera in the rain? And if so, what kinda rain, like is spitting ok but anything else bad, or could I take it out in torrential rain and be fine (I'm somehow doubting this but it would help to know for sure ) Thanks again!