Sigma 4.5mm F2.8 EX DC Circular Fisheye HSM specs
Lens Construction: 13 Elements in 9 Groups
Angle of View: 180 degrees
Number of Diaphragm Blades: 6 Blades
Minimum Aperture: F22
Minimum Focusing Distance: 13.5cm/5.3 in.
Maximum Magnification: 1:6
Filter: Insertion-type gelatin filter into rear of the lens
Dimensions: Diameter 76.2mm X Length 77.8mm
3.0 in. X 3.1 in.
Weight: 470g/16.6 oz.
Corresponding AF Mounts:
Sigma, Nikon, Canon, Sony/Minolta, Pentax
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Filed in: Sigma Camera Lenses
Description: This autofocus circular fisheye lens has an angle of view of 180 degrees in all directions. It is exclusively designed for digital SLR cameras with the APS-C size image sensor. When used in conjunction with digital SLRs with APS-C size image sensors, it produces circular image within the frame.