Cylindrical 3D view cam ?


Is it possible to modify the perspective view to cylindrical view? In fact perspective view is rectilinear and i wonder if i can modify it to cylindrical ( or equirectangular ) in order to place elements on a pano? There is no preview with panorama cycle option ( fish-eye, etc…), but I think it should be useful to change the view projection type . If it can be modified via python script I would be very happy.

Can someone help me ?