|Lens type||Prime lens|
|Max Format size||35mm FF|
|Focal length||8 mm|
|Lens mount||Canon EF, Nikon F (FX), Sigma SA Bayonet|
|Number of diaphragm blades||6|
|Special elements / coatings||SLD glass|
|Minimum focus||0.14 m (5.31″)|
|Full time manual||Yes|
|Focus notes||screw drive for nikon mount|
|Weight||400 g (0.88 lb)|
|Diameter||74 mm (2.89″)|
|Length||69 mm (2.7″)|
|Filter notes||rear gelatin filter|
Ever wondered how a trout sees the world? Well, there’s an app for that. But in the meantime, the Sigma 8mm F3.5 EX DG Circular Fisheye is compatible with full-frame and APS-C format DSLRs and produces a circular image with a 180-degree angle of view within a black surrounding frame.
A minimum focusing distance of 5.3 inches and a magnification ratio of 1:4.6 allows for some pretty crazy results. If distorted interiors, portraits and landscapes leave you cold, fisheye lenses also have some serious scientific applications.