Sigma 4.5mm F2.8 EX DC HSM Circular Fisheye Overview
Announced Nov 14, 2007
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Wideangle fisheye prime lens | Canon EF-S, Nikon F (DX), Pentax KAF3, Sigma SA Bayonet, Sony/Minolta Alpha | 486
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Product description
Announced
Nov 14, 2007
Discuss in the Third Party Lens Talk forum
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.
Product timeline
Nov 14, 2007
Quick specs
| Lens type | Prime lens |
| Focal length | 4.5 mm |
| Image stab. | No |
| Lens mount | Canon EF-S, Nikon F (DX), Pentax KAF3, Sigma SA Bayonet, Sony/Minolta Alpha |
| Max aperture | F2.8 |
| Min aperture | F22 |
| Min focus | 0.14 m (5.31″) |
| Weight | 470 g (1.04 lb) |
| Length | 78 mm (3.06″) |
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