urm... doubt it...  what is the angle of view of the 15mm?  because you cant really go beyond 180 degrees without a specialist lens (or the nikon 8mm fish with a shaved collar can go to 185 degrees i am told).

However - you might get an interesting effect if you tried it.

"In every colour, there's the light.
In every stone sleeps a crystal.
Remember the Shaman, when he used to say:
Man is the dream of the Dolphin"

Rich Meadows Photography