Water droplets on a CD surface (4).

Here's another from my outdoor macro shoot in June last year. For this one, I sprayed a few droplets onto the CD, then tipped it to one side, so that they ran into streaks of smaller droplets. There's a mini 'rainbow' in each one, offset against the bigger one on the CD surface.

Camera/lens settings: ISO 100, f/16, 1/40s, 90mm, tripod & cable release.