Cheap Price For Polarizer Filters.

The only difference is the quality of the glass and construction. You want the best quality glass, glass of low quality because it will reduce the image quality. The glass will also do better, but not both.


It is almost impossible to make a perfect polarizer and circular polarizer aluminum foil perfect. It's expensive for the polarization of aluminum foil between two pieces of optical glass in a perfect shape. They are the shortcuts on the use of a piece of glass, not perfectly parallel use of glass, the glass is not glued to the polarization film, and the use of the foil polarization cheap.

Aluminum circular polarizing must do the following:

Eliminate the linear polarizing light of the "wrong" direction equally across the spectrum;

Linearly polarizing light passing from the direction equally across the spectrum, and

Circularly polarizing the linearly polarized light output of the linear polarizer completely in all wavelengths. This is the most difficult to achieve but is the least important.

All three are difficult to meet, and imperfections can lead to differences of color, but lighter than the issue can not in many circumstances.

Just try to stay away from anything that seems too good to be true.

Something of a polarizing, however, you really do not want to think about a cheap price, so go with something a little better.