Mike, If you're contemplating filters, I bought mine from the US. They are a clone of the Cokin system
http://www.cokin.com/ that attatches to the front of the lens. I paid around $98 for the P series adapter, polarising, Graduated Tobacco and neutral denisty filters. Cost from an Oz dealer for genuine Cokin system and filters was $275. The advantage of the cokin (or in my case clone) system is that you can slide the filters up or down to compensate for overly bright skies etc, and the filters can be stacked as well in the holder.
