I believe fearless leader mentioned the two types of polarisers available: linear and circular. When you do the workshop Gordon, could you include the distinction between the two with regards to metering and AF? I think this is an important point for the beginning photographer to understand before they make the investment. As tempting as the cheaper linear polarisers are, they just aren't really suitable for the modern DSLR.
This is where I am and am looking for a polarizer and UV filter, but I'm having a very hard time figuring out what is the price I need to spend to get on that works decently. I am a beginner so $150 filters are to high for me right now. But I will be shooting in mexico's beach this year, and would like some help with nice sky and ocean colors. And do all of circular filters rotate to change the polarizing effect.