I've had a hankering to play with fisheye photography, but didn't have the budget for a lens for my OM-D. So I spent $16 and bought the 3in1 Fisheye Wide Angle Macro Lens kitfor my iPhone 4S. I went with this budget kit because it was affordable and included a snap-on case for the iPhone. That way I didn't have to apply any adhesive to the phone itself.
I carry the lens in my pocket, then make crazy photography shots when I have a moment or two of downtime during my everyday life.
I'm having a blast, and I'm "scratching that fisheye itch" without dinging my credit card.
Join me on my Instagram site as I explore the world of mobile photography.