偏光鏡的知識

I always suggest use Nikon CPLII ... but of course the cost will be higher... and also depend on the size...
Here is the link for compare of Hoya & Nikon CPL II
http://www.dchome.net/viewthread.php?tid=409655&extra=page%3D5

This is the price reference for CPL
http://www.dchome.net/viewthread.php?tid=298328&extra=page%3D1

** If you are Canon user... I don't think you will use Nikon CPL II ??

Enjoy!!