He remarked that one way to test that was with TV remote controls , I ran downstairs in a flash, and I saw the remote signal shining brightly in my viewpanel.
Some results are below.
Photos on our school Intranet only Best viewing at 800 x 640 or larger Clicking on an image will enlarge it. The first few photos were done with a handheld camera and a handheld filter. The flare in the upper right is a reflection from the sun. At left, my finger holds the filter. Note sky detail.