I rebuilt my pinhole lens cap today. Replacing the foil with some thin steel I bought at the art supply store. Still not as good as I'd like it to be, but sharpness as improved a bit (yes, it was THAT bad before). Still has a neat look. By the way, it's crazy bright out today at 104 degrees and I still needed 1/50th of a second at ISO3200 for this shot.
Click to enlarge.