Has anybody ever tryed these fisheye lens for an iPhone?
http://www.ebay.com.au/itm/Universal-Fish-Eye-Len-180-Degree-Angle-for-iPhone-iPad-Samsung-Cellphone-Camera-/200972605889?pt=AU_MobilePhoneAccessories&hash=item2ecae699c1&_uhb=1
They seem pretty good for the price.