2 A B C D E F G H I K L M N O P R S T U V W
Ga Ge Gn Gr

gnomonic

gnomonic lenses (German : gnomonische Objektive) use an image mapping of the type

r = f tan \theta

[table caption=”gnomonic angles” width=”500″ colwidth=”50|50|50|50″ colalign=”center|center|center|center”]
weak,medium,strong,max
54,75,102,< 180
[/table]

Gnomonic lenses can provide a wide viewing angle , but are no fisheye lenses

see:
fisheye types