Ultra wide angle lens
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An ultra-wide angle lens is a lens whose focal length is shorter than that of an average wide-angle lens, providing an even wider angle of view.
Leitz Elmarit-R 19/2.8 ultra-wide angle lens for Leica R cameras
Panasonic Lumix G Vario 1:4/7–14 mm Asph.
Laowa C-Dreamer 9 mm f/2.8
Canon New FD 14 mm 1:2.8 L
Zeiss Biogon
Videos
Biogon is the brand name of Carl Zeiss for a series of photographic camera lenses, first introduced in 1934. Biogons are typically wide-angle lenses.
KMZ Jupiter-12 lens
Leica CL with Carl Zeiss Biogon 2,8 / 28 mm lens
Schneider Kreuznach Super-Angulon 65 mm f/8 for Linhof cameras
Licensed Super-Angulon 21 mm f/4 for Leica thread mount rangefinders