Sigma 4.5mm f/2.8 EX DC HSM Circular Fisheye Lens for Canon EF

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EF-Mount Lens/APS-C Format 7.2mm (35mm Equivalent) Aperture Range: f/2.8 to f/22 One SLD Element Super Multi-Layer Coating 180° Angle of View Circular, Distorted Image Hyper Sonic Motor AF System 6-Blade Diaphragm The Canon EF-mount 4.5mm f/2.8 EX DC HSM Circular Fisheye from Sigma produces a circular image with an expansive 180° angle of view. Benefitting the unique look of the lens is an advanced optical design that utilizes one SLD glass element to reduce color fringing and chromatic aberrati