1x Schneider 4x4 Polarising Filter
When used outside on sunny days, polarising filters have the effect of saturating colours and deepening blue skies. They can also be used in conjunction with other filters (although the polariser should always be placed in front of polyester filters to ensure it functions correctly). Polarising filters are available in two types, linear and circular. This is not referring to the physical shape of the filter but to the way the filter changes the light waves thereby achieving the polarising effect.
