2-in-1 180° (0.28X) Fisheye (+ 1.25X Macro) Lens for iPhone 5c
(this is not done by an independent 3rd party blogger)
Picture taken by iPhone 5c and with the the 0.28X fisheye lens
Picture taken by iPhone 5c and without the 0.28X fisheye lens.
What a big difference!
Result: only acceptable, slightly blur at the 4 corners!