A definition of Fisheye lens
A lens designed to produce a particularly wide angle of view with intentional curvilinear distortion. This is in contrast to most lenses which are rectilinear in design (i.e ones that aim to reproduce linear scene details as faithfully as possible).
![](https://www.whatdigitalcamera.com/wp-content/uploads/sites/13/2012/06/11133_7C000006234_7C77d3_fisheye_lens.gif)
![](https://www.whatdigitalcamera.com/wp-content/uploads/sites/13/2012/06/11133_7C00000622f_7C3b47_fe.gif)