For the money, the Olloclip can't be beat
The Olloclip slips on over the iPhone’s corner and, depending on which direction it’s turned, gives a fish-eye, macro, or wide-angle effect to your shots. The simplicity and sturdiness of its design trumps other lens options that are obtrusive, flimsy and inconvenient by comparison.
Read original review at Wirecutter.
Alexander George from Wirecutter (May 16, 2012) Helpful