Menu Lens Type Spherical

Lens sub-section in the Iray section of the camera Attribute Editor
Lens Type Spherical renders a conventional spherical camera mapping. When setting the image aspect ratio to 2:1 the resulting image can be used as spherical environment.
When Spherical is selected only the position of the camera will influence the resulting image. Focal Lenght, Film Offset, etc. have no effect to the way the spherical projection is calculated.