Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye
The 4.5mm F2.8 EX DC Circular Fisheye HSM is a true fisheye optic for crop cameras, projecting a circular 180-degree image onto APS-C sensors. This lens sports a focal length of 4.5mm and maximum aperture of F2.8, Sigma's HSM ultrasonic-type focusing and SLD low-dispersion lens elements. Aside from 'edgy' skateboarding shots, circular fisheyes are actually quite useful for astrophotography and scientific applications.
|Lens type||Prime lens|
|Focal length||4.5 mm|
|Lens mount||Canon EF-S, Nikon F (DX), Pentax KAF3, Sigma SA Bayonet, Sony/Minolta Alpha|
|Min focus||0.14 m (5.31″)|
|Weight||470 g (1.04 lb)|
|Length||78 mm (3.06″)|