[click on image gets you a larger image]
Here now more photographic results I got (took multiple images while rotating the filter), presented as animated gifs....
Roofs of some neighbouring houses showing strong polarizing effect of glass windows and metal:
Succulent plant - Lewisia showing strong polarizing effects:
I have now solved the change of focus issue which I previously had.
Some insects are able to see the polarization angle (and btw. we humans can also, but needs some traing: Haidinger's Brush) especially honeybees which navigate using the polarization angle of ultraviolet (UV) light.
I will continue to make more tests later using the other polarizers and also the special waveplates, which allow for circular polarized light.
Stay tuned, more will follow on that fascinating subject...
More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos