more zebras

just one more pic of them and I'll stop.

Do you see interference (I think it's interference, although my optics are shaky) - an additional pattern is formed on defocused zebra in the background? Or is it just me?

Both zebra pictures were converted to black&white using infrared pre-set in photoshop elements. I just tweaked it a bit, adding more green and adjusting other channels to match. By a stroke of luck, it make the background white in first case.