It has a bulb-like aspherical lens, similar to notable wide-angle and fisheye lenses such as the Nikon AF-S NIKKOR 14-24mm f/2.8G ED, Nikon AF DX Fisheye-Nikkor 10.5mm f/2.8G ED, or Tokina AT-X 107 DX AF 10-17mm f/3.5-4.5 fisheye lens.
Sigma Chi | Sigma Xi | Sigma Alpha Epsilon | Delta Sigma Theta | Lens | Lens, Pas-de-Calais | Independent Lens | Nicholas Lens | Phi Beta Sigma | lens | Fresnel lens | Single-lens reflex camera | Sigma Corporation | Sigma Alpha Mu | Sigma Phi Epsilon | Sigma | Kappa Sigma | Beta Gamma Sigma | Tau Beta Sigma | Six Sigma | Sigma Alpha Iota | Phi Sigma Kappa | Panasonic Lumix 45mm lens | SK Sigma Olomouc | Sigma SD14 | Sigma Gamma Rho | Phi Sigma Epsilon | Panasonic Lumix G 14mm lens | Panasonic Lumix 20mm lens | Panasonic Leica DG 25mm lens |