I just got back from a trip to Japan and took some great photos with my Canon Powershot S3 IS. For those unfamiliar with the camera, it's a prosumer model that has most of the manual settings the SLR cameras have but at a more affordable price. I took some great photos, but with the right lenses and filters, I think I could have taken some amazing shots. So I'm currently looking around for a new lens and a filter or two. I really love landscape shots, so I think I'm going to get a wide angle lens. I like sky shots, so I heard a polarizer would be good to get. I also need to get a special converter for my camera so I can use the lens. The lens is $68.95 and is the Raynox DCR 730. http://www.amazon.com/gp/product/B0...TF8&coliid=I2H3N26XTGPNDE&colid=1RIHGSWWNE8L0 This is the 58mm polarizer I found: http://www.amazon.com/gp/product/B0...TF8&coliid=I1ABK37LL592UN&colid=1RIHGSWWNE8L0 The converter I need: http://www.amazon.com/gp/product/B0...UTF8&coliid=I8D25UUQ5MEIM&colid=1RIHGSWWNE8L0 Are these all good equipment choices? I don't want to spend too much because the camera was only $300, but I would like to have decent quality, too. Addi tonally, what are some good places for buying this type of equipment?