My daughter always says I don’t experiment enough, so I borrowed one of her prism filters and played around with them a little.
These are not the usual screw on or slide in filters, but large, chunky pieces of glass that you hold in front of the lens to break the light.
This way you can get, depending on sunlight and scenery, all kinds of colorful effects, reflections (from the back), and unexpected distortions.
The filter I used was circular with a ring of smaller facets around the center, making it better suitable for portraits than landscape. As usual, there was nobody else around.
Above you see the effect of reflections, and below a circle of trees refracted at the outer facets.
This will clearly require some more praxis…
The Inner Frame 