The ridges around the edges remind me of something you'd see on an electron microscope image.
Have a g'day! H.
| camera | Canon EOS 400D DIGITAL |
| exposure mode | aperture priority |
| shutterspeed | 1/200s |
| aperture | f/14.0 |
| sensitivity | ISO800 |
| focal length | 300.0mm |
| resolution | 1050x700 pixels |