Polarizing with crossing of filters

The setup is as follows, vertically mounted on the following order:

 

Camera + macro + linear polarizer filter + microscope lense + citric acid crystals on a glass slide + plastic polarizer sheet + light source.

 

Used Helicon Remote with time lapse mode. Shot 40 photos turning manually the linear POL-filter mounted on camera a bit between each shot, resulting in turning the filter a combined full circle, i.e. 360 degrees.

 

This testmovie exhibits the result of crossing the polarizers.

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Uploaded on March 8, 2015