Sigma 4.5mm F2.8 EX DC Circular Fisheye HSM lens

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Sigma 4.5mm f/2.8 EX DC circular fisheye
Key features
Maker: Sigma Corporation
Image stabilization: No No
Ultrasonic motor: Yes Yes
Short back focus: No No
Macro capable: No No
Unique features: circular fisheye
Technical data
Type: circular fisheye lens
Focal length: 4.5mm
Frame coverage: 180 degrees
Aperture (max/min): f/2.8
Construction: 9 groups / 13 elements
# Diaphragm blades: 6
Close focus distance: 13.5cm
Max. magnification: 1:6
Max. diameter: 76.2mm
Max. length: 77.8mm
Weight: 470g (16.6oz)
Filter diameter: rear (Gelatin filter)
Lens hood: none
Angle of view
Horizontal: 180
Vertical: 180
Diagonal: 180
Retail info
MSRP US$ $1400

The Sigma 4.5mm f/2.8 EX DC circular fisheye is a photographic lens manufactured by Sigma Corporation. It is a circular fisheye lens, designed to project a 180-degree field of view in all directions onto a circular image. It is the first such lens to be provide the complete circular fisheye effect on crop factor digital SLR cameras that do not have a full 36x24mm sensor.[1] This lens is available in Canon, Nikon, Sigma, Pentax and Sony mounts.

See also[edit]


  1. ^ "Sigma 4.5mm F2.8 EX DC Circular Fisheye HSM". Retrieved 2009-08-21.