I was going to do some experiments with flash and a zone plate to see what it looks like with reduced-chromatic light, see if it looks more like pinhole or what happens. It was calculated w/550 nm (yellowish green I suppose).

With pinhole or zone plate I wouldn't be able to see any optical flaws :O).


They look better than many of my Series VI filters that are wrinkled now...only reason to use those is for a toy camera look I guess...