Quote - A wide angle exaggerates depth, and at a certain point will start showing a lot of distortion, straight lines will curve etc but it expands field of view.

 

I've always wondered how this is handled in CG...  In 3D programs, straight lines seem to always be drawn straight, as edges drawn from vertex to vertex.  I haven't seen, or at least have not noticed, visible curvature as a result of lens angle.