Ultra-wide lens with a 180° angle of view, producing a circular image with black borders. Used for extreme perspective effects.
Technical Details
Circular fisheye lenses achieve exact 180° diagonal angles of view and use a retrofocus design with 8-12 lens elements. The Nikon 8mm f/2.8 and Canon EF 8-15mm f/4L cover a full semicircle at an 8mm focal length, while the Sigma 4.5mm f/2.8 captures even 183°. The front nodal point is extremely far forward, making conventional filters impossible. The image follows an equidistant projection: f × θ = image radius, where θ is the angle to the optical axis.
History & Development
In 1962, Nikon developed the first commercial fisheye lens, the Nikkor 8mm f/8, for meteorology and astronomy. Hill Sky Lens Company had already produced early prototypes for cloud observation in 1924. In 1972, Nikon released the legendary 6mm f/2.8 with a 220° angle of view – still the most extreme fisheye for 35mm film to this day. Modern versions like the Laowa 4mm f/2.8 or the Entaniya HAL series achieve better edge sharpness with more compact designs thanks to new glass types.
Practical Use in Film
Stanley Kubrick used the Zeiss 6mm fisheye in "The Shining" (1980) for the oppressive hotel corridors, creating spatial disorientation. "Requiem for a Dream" (2000) utilized circular fisheyes for subjective drug-induced sequences. In music videos like "Around the World" (Daft Punk, 1997), they create surreal dance studio perspectives. Post-production is usually done in DaVinci Resolve or Adobe Premiere with Lens Distortion plugins for partial correction of the image center while retaining edge distortion.
Comparison & Alternatives
Diagonal fisheyes fill the entire sensor format and offer more practical image composition, while circular fisheyes convey a full hemispherical impression. Rectilinear ultra-wide-angle lenses (14-24mm) correct perspective distortion but lose the characteristic fisheye aesthetic. Digitally, similar effects are created by 360° cameras with subsequent "Little Planet" projection or VR headset recordings, but they rarely achieve the optical quality of true fisheye lenses.