Here is how you can make a polarization filter for your camera very cheaply.
Just take a pair of 3D glasses from a theatre movie and rip the filter out. From one side it will change the wavelength (color) of the light and the other side will work as a polarization filter.
Testat att ta några bilder med det? Pol-filter är ju så jäkla dyra…
Har inte prövat än, väntar på att solen ska visa sig =)