Freaky Orb Rings

I took the photo below on November 27, 2017 while photographing nothing but ordinary drops of pure, clean water falling against a dark featureless background. We see some of the weird things I call orb rings, which I have photographed many times.

The sizes of the holes in orb rings varies from small to large. In the example below that I took on November 8, 2017 (also while photographing nothing but ordinary drops of pure, clean water falling against a dark featureless background), we see smaller holes in the orb rings.